Relevant bibliographies by topics / Pulsar polarimetry

Academic literature on the topic 'Pulsar polarimetry'

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Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Pulsar polarimetry"

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Tremblay, Steven E., Mengyao Xue, N. D. Ramesh Bhat, and Caterina Tiburzi. "Verifying the low frequency pulsar polarimetry of the MWA." Proceedings of the International Astronomical Union 13, S337 (September 2017): 416–17. http://dx.doi.org/10.1017/s174392131701033x.

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AbstractStudying the polarised properties of pulsars has a rich history giving unique geometric information about pulsars as well as testing the theories of pulsar emission physics. Performing such studies with the MWA has the attraction that the percentage of linear polarisation of many pulsars increases as the observing frequency decreases. Here we discuss the strategies being employed to verify the polarimetric response of the MWA’s high time resolution data.
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Shearer, Andrew, and Eoin O’ Connor. "Optical pulsars and polarimetry." Proceedings of the International Astronomical Union 13, S337 (September 2017): 191–94. http://dx.doi.org/10.1017/s174392131700998x.

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AbstractDespite the early optical detection of the Crab pulsar in 1969, optical pulsars have become the poor cousin of the neutron star family. Only five normal pulsars have been observed to pulse in the optical waveband. A further three magnetars/SGRs have been detected in the optical/near IR. Optical pulsars are intrinsically faint with a first order luminosity, predicted by Pacini, to be proportional to P−10, where P is the pulsar’s period. Consequently they require both large telescopes, generally over-subscribed, and long exposure times, generally difficult to get. However optical observations have the benefit that polarisation and spectral observations are possible compared to X-ray and gamma-ray observations where polarisation measurements are limited. Over the next decade the number of optical pulsars should increase as optical detectors approach 100% quantum efficiency and as we move into the era of extremely large telescopes where limiting fluxes will be 30 to 100 times fainter compared to existing optical telescopes.
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von Hoensbroech, A., and K. M. Xilouris. "Effelsberg multifrequency pulsar polarimetry." Astronomy and Astrophysics Supplement Series 126, no. 1 (November 1997): 121–49. http://dx.doi.org/10.1051/aas:1997255.

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Hoensbroech, Alexis von. "Pulsar Polarimetry – New Aspects at High Radio Frequencies." International Astronomical Union Colloquium 177 (2000): 267–68. http://dx.doi.org/10.1017/s0252921100059674.

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AbstractPulsar polarimetry is an important tool for the investigation of the physical processes and the environment in the magnetosphere. However, the great variety of observed polarization states and the few obvious systematics hamper a straightforward interpretation. In this paper it is shown that the polarimetric features of pulsars are much more systematic at high radio frequencies. An analysis of 116 profiles at 4.85 GHz reveals a clear correlation between the degree of polarization andĖ. Also evidence is shown for pulsars with a heavily increasing degree of circular polarization. Further, a basic concept of a simple magnetospheric propagation scenario is presented, which can account for a variety of polarimetric properties of pulsars.
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Crawford, Fronefield, Victoria M. Kaspi, and Richard N. Manchester. "Radio Polarimetry Results for Young Southern Pulsars." International Astronomical Union Colloquium 177 (2000): 247–48. http://dx.doi.org/10.1017/s0252921100059601.

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AbstractWe present radio polarimetry results for nine Southern pulsars. Six of the nine are young, with characteristic ages less than 100 kyr and high spin-down luminosities. All six show significant linear polarization, and we confirm a previously noticed trend in which the degree of linear polarization increases with spin-down luminosity. We have used the rotating vector model to fit the observed position angle data for PSR J1513–5908 (B1509–58). We find that a magnetic inclination angleα> 60° is excluded at the 3σlevel in the fit, and that the geometry suggested by the morphology of an apparent bipolar X-ray outflow is marginally inconsistent with a recent model of the pulsar magnetosphere.
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von Hoensbroech, A., and K. M. Xilouris. "Multi-Frequency Pulsar Polarimetry at High Frequencies." International Astronomical Union Colloquium 160 (1996): 267–68. http://dx.doi.org/10.1017/s0252921100041683.

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AbstractA sample of 62 pulsar profiles has been studied with full polarization information at high radio frequencies, aiming at studying the dependency of emission altitude at the deepest layers of pulsar magnetospheres. The emission is consistent with heights ranging between 1-2% of the light-cylinder-radius, while a slight radius-to-frequency mapping is evident.
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Poutanen, Juri. "Relativistic rotating vector model for X-ray millisecond pulsars." Astronomy & Astrophysics 641 (September 2020): A166. http://dx.doi.org/10.1051/0004-6361/202038689.

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The X-ray radiation produced on the surface of accreting magnetised neutron stars is expected to be strongly polarised. A swing of the polarisation vector with the pulsar phase gives a direct measure of the source inclination and magnetic obliquity. In the case of rapidly rotating millisecond pulsars, the relativistic motion of the emission region causes additional rotation of the polarisation plane. Here, we develop a relativistic rotating vector model, where we derive analytical expression for the polarisation angle as a function of the pulsar phase accounting for relativistic aberration and gravitational light bending in the Schwarzschild metric. We show that in the case of fast pulsars the rotation of the polarisation plane can reach tens of degrees, strongly influencing the observed shape of the polarisation angle’s phase dependence. The rotation angle grows nearly linearly with the spin rate but it is less sensitive to the neutron star radius. Overall, this angle is large even for large spots. Our results have implications with regard to the modelling of X-ray polarisation from accreting millisecond pulsars that are to be observed with the upcoming Imaging X-ray Polarimeter Explorer and the enhanced X-ray Timing and Polarimetry mission. The X-ray polarisation may improve constraints on the neutron star mass and radius coming from the pulse profile modelling.
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O’Connor, Eoin G. P., Andrew Shearer, Christian Gouiffes, and Philippe Laurent. "High Time Resolution Astronomical Polarimetry with GASP." Proceedings of the International Astronomical Union 13, S337 (September 2017): 384–85. http://dx.doi.org/10.1017/s1743921317010626.

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AbstractThe Galway Astronomical Stokes Polarimeter (GASP) is a high time resolution, full-Stokes imaging polarimeter which utilises a Fresnel rhomb prism as a beam-splitter and quarter wave retarder. The ability to perform optical photometry and polarimetry at high frame rates enables more detailed studies of a multitude of compact objects including; optical pulsars, magnetars and Active Galactic Nuclei (AGN). We present a brief discussion of the instruments’ current capabilities and hardware design. GASP is currently configured with two Electron Multiplying Charge-Coupled Devices (EMCCDs), which offer sub-millisecond frame readout speeds over a defined region of interest on the sensor. We will report results from an observational campaign at the William Herschel Telescope (WHT) in December, 2015. During this campaign GASP was used to study the Crab Pulsar, V404 Cygni and polarisation standards. As a subset of our analysis we have identified a significant contribution from the Interstellar Medium (ISM) and the interaction of a varying polarised source with the ISM, the subsequent conversion of linearly polarised light to circular, and its dependence on the angle of the source emission electric field orientation. Further to the presentation of results we will discuss future observational work, which is planned for September 2017 and subsequent improvements to increase the temporal resolution of the detectors.
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Moran, Paul, Andy Shearer, and Roberto Mignani. "Optical Polarimetry of the Crab Nebula." Proceedings of the International Astronomical Union 7, S285 (September 2011): 379–81. http://dx.doi.org/10.1017/s1743921312001135.

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AbstractTime-resolved polarisation measurements of pulsars provide an unique insight into the geometry of the emission regions. Hubble Space Telescope (HST) polarisation data of the Crab Nebula were obtained from the Multimission Archive at STScI (MAST). The data are composed of a series of observations of the Crab Nebula with the HST and ACS camera system taken in three different polarisation filters (0°, 60° and 120°) between 2003 August and 2005 December. Polarisation vector maps of the Nebula were produced with the polarimetry software IMPOL. The degree of polarisation (P.D.) and the position angle (P.A.) of the pulsar's integrated pulse beam were measured, and also that of the nearby Synchrotron Knot, yielding P.D. = 4.90 ± 0.33 %, P.A. = 106°.46 ± 1°.9 for the pulsar, and P.D. = 61.70 ± 0.72 %, P.A. = 126°.86 ± 0°.23 for the Synchrotron Knot. These results are consistent with those of obtained by others using INTEGRAL.
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Kern, Jeffrey S., Timothy H. Hankins, and Joanna M. Rankin. "Single Pulse Polarimetry of the Vela Pulsar." International Astronomical Union Colloquium 177 (2000): 257–60. http://dx.doi.org/10.1017/s0252921100059649.

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AbstractMulti-frequency, single-pulse polarimetric observations of the Vela pulsar have been made using the VLA. These high time resolution measurements allow us to probe the geometry, and the time dependent characteristics of the radio emission region. Evidence for multiple emission components with differing spectral indices is found.
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Dissertations / Theses on the topic "Pulsar polarimetry"

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Van, Straten Willem Herman Bernadus, and straten@astron nl. "High-Precision timing and polarimeter of PSR JO437-4715." Swinburne University of Technology. School of Biophysical Sciences and electrical Engineering, 2003. http://adt.lib.swin.edu.au./public/adt-VSWT20040311.123754.

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This thesis reports on the recent results of a continuing, high-precision pulsar timing project, currently focused on the nearby, binary millisecond pulsar, PSR J0437_4715. Pulse arrival time analysis has yielded a remarkable series of constraints on the physical parameters of this system and evidence for the distortion of space-time as predicted by the General Theory of Relativity. Owing to the proximity of the PSR J0437_4715 system, relative changes in the positions of the Earth and pulsar result in both annual and secular evolution of the line of sight to the pulsar. Although the changes are miniscule, the effects on the projected orbital parameters are detectable in our data at a high level of significance, necessitating the implementation of an improved timing model. In addition to producing estimates of astrometric parameters with unparalleled precision, the study has also yielded the first three-dimensional orbital geometry of a binary pulsar. This achievement includes the first classical determination of the orbital inclination, thereby providing the unique opportunity to verify the shape of the Shapiro delay and independently confirm a general relativistic prediction. With a current post-fit arrival time residual RMS of 130 ns over four years, the unrivaled quality of the timing data presented herein may eventually contribute to the most stringent limit on the energy density of the proposed stochastic gravitational wave background. Continuing the quest for even greater timing precision, a detailed study of the polarimetry of PSR J0437_4715 was undertaken. This effort culminated in the development of a new, phase-coherent technique for calibrating the instrumental response of the observing system. Observations were conducted at the Parkes 64-m radio telescope in New South Wales, Australia, using baseband recorder technologies developed at York University, Toronto, and at the California Institute of Technology. Data were processed off-line at Swinburne University using a beowulf-style cluster of high-performance workstations and custom software developed by the candidate as part of this thesis.
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Xu, Lina. "Measurement of complex ultrashort laser pulses using frequency-resolved optical gating." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29693.

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Thesis (Ph.D)--Physics, Georgia Institute of Technology, 2010.
Committee Chair: Rick Trebino; Committee Member: Ahmet Erbil; Committee Member: John Buck; Committee Member: Stephen Ralph; Committee Member: Zhigang Jiang. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Maitra, Chandreyee. "High Magnetic Field Neutron Stars : Cyclotron Lines and Polarization." Thesis, 2013. http://etd.iisc.ernet.in/2005/3410.

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This thesis concerns with the study of X-ray binaries which are gravitationally bound systems consisting of a compact object (either a neutron star or a black hole) and usually a non degenerate companion star, both rotating around the common centre of mass. The compact star shines brightly in the X-ray regime. Emission from these systems are powered by accretion which is the most radioactively efficient mechanism known in the universe by the release of gravitational potential energy when matter from the companion star falls on the compact object. Accretion onto high magnetic field neutron stars are special as the magnetic field plays a crucial role in governing the dynamics of gas flow and the flow of the matter close to the compact object. The radiation emitted from these systems are anisotropic and for a distant observer, the intensity is modulated at the spin period of the neutron star, hence these objects are called accretion powered pulsars. The angular pattern of the emitted radiation is also highly anisotropic and depends on the mass accreted and hence the luminosity. The beaming pattern commonly known as the pulse profiles exhibit a wide variety in the pulse shape and pulse fraction and vary with energy as well as intensity. They also exhibit cyclotron absorption features in their energy spectrum which are a direct probe to the magnetic field geometry of these systems. This thesis is dedicated to the study of the magnetic field and emission geometry of accretion powered pulsars through the pulse phase resolved studies of the cyclotron absorption features which are a direct probe of the magnetized plasma. In order to study these features in detail broadband continuum modeling of the energy spectrum is done, taking care of all other factors which may smear the pulse phase dependence. Another prerequisite for detailed continuum modeling is accounting for the low absorption dips in the pulse profiles of many these sources. The dips are presumably formed by phase locked accretion stream causing partial covering absorption when the stream is along our line of sight towards the emission region. Studying the pulse phase dependence of this partial covering absorber also provides us with important clues on the local environment of the neutron star and the structure of the accretion stream. All of these studies are performed with data from the broadband and most sensitive instruments onboard the Japanese satellite Suzuki. Lastly we provide estimates of the polarization expected to be detected from these sources by a Thomson scattering polarimeter being developed to observe the polarization of X-rays in the energy range of 5--30 keV. Along with the X-ray pulsars, we also make an estimate of the likelihood of detection of X-ray polarization from black hole X-ray binaries in different spectral states. This is a particularly interesting topic as it will play a crucial role in providing additional handles on the magnetic field geometry in accretion powered pulsars as well as constrain the fundamental parameters of a black hole like its spin.
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Book chapters on the topic "Pulsar polarimetry"

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Harding, Alice K. "Multi-Wavelength Polarimetry of Isolated Pulsars." In Astrophysics and Space Science Library, 277–99. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-19715-5_11.

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Feroci, Marco, and Paolo Soffitta. "X-ray Polarimeters." In High-Energy Emission from Pulsars and their Systems, 585–609. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-17251-9_48.

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Koshelev, V. I., E. V. Balzovsky, and Y. I. Buyanov. "Vector Receiving Antenna for Ultrawideband Radar Polarimetry." In Ultra-Wideband, Short-Pulse Electromagnetics 6, 515–22. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-9146-1_48.

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Boerner, Wolfgang-Martin, and James Salvatore Verdi. "Polarimetry in Ultrawideband Interferometric Sensing and Imaging." In Ultra-Wideband, Short-Pulse Electromagnetics 3, 447–59. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-6896-1_52.

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Yarovoy, Alexander, Friedrich Roth, Vsevolod Kovalenko, and Leo Ligthart. "Application of UWB Near-Field Polarimetry to Classification of GPR Targets." In Ultra-Wideband, Short-Pulse Electromagnetics 7, 655–64. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-37731-5_70.

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Sletten, Mark A., and Dennis B. Trizna. "Ultra-Wideband, Polarimetric Radar Studies of Spilling Breakers." In Ultra-Wideband, Short-Pulse Electromagnetics 2, 149–55. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1394-4_17.

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Conference papers on the topic "Pulsar polarimetry"

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Volpi, Delia, Luca Del Zanna, Elena Amato, and Niccolò Bucciantini. "Polarisation from Pulsar Wind Nebulae." In Polarimetry days in Rome: Crab status, theory and prospects. Trieste, Italy: Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.078.0017.

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Ardavan, Houshang, Arzhang Ardavan, Joseph Fasel, John Middleditch, Mario Perez, Andrea Schmidt, and John Singleton. "A new mechanism of generating broadband pulsar-like polarization." In Polarimetry days in Rome: Crab status, theory and prospects. Trieste, Italy: Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.078.0016.

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Germanà, Claudio. "Optical pulsations of the Crab Nebula pulsar with AquEYE." In Polarimetry days in Rome: Crab status, theory and prospects. Trieste, Italy: Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.078.0031.

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Nakajima, Takashi, Ahovi Kponou, Yousef Makdisi, and Anatoli Zelenski. "Ultrafast Nuclear Spin Polarization by Short Laser Pulses." In POLARIZED ION SOURCES, TARGETS AND POLARIMETRY. AIP, 2008. http://dx.doi.org/10.1063/1.2888099.

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Dyks, Jaroslaw, and Geoffrey A. E. Wright. "The role of special relativistic effects in shaping the intensity profiles and polarisation of pulsars." In Polarimetry days in Rome: Crab status, theory and prospects. Trieste, Italy: Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.078.0015.

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Toizumi, T., K. Kawakami, K. Tokoyoda, T. Enomoto, Y. Yatsu, N. Kawai, T. Nakamori, et al. "The Small Satellite “Tsubame” for Polarimetry of GRBs." In RADIO PULSARS: AN ASTROPHYSICAL KEY TO UNLOCK THE SECRETS OF THE UNIVERSE. AIP, 2011. http://dx.doi.org/10.1063/1.3615157.

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Espig, Martin, Joachim Enders, Yuliya Fritzsche, and Markus Wagner. "Investigation of pulsed spin polarized electron beams at the S-DALINAC." In XVth International Workshop on Polarized Sources, Targets, and Polarimetry. Trieste, Italy: Sissa Medialab, 2014. http://dx.doi.org/10.22323/1.182.0059.

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Ionita, Iulian, and Ovidiu Toma. "Biotissue structure investigation using ultra-short pulsed laser polarimetry." In SPIE Photonics Europe, edited by Jürgen Popp, Wolfgang Drexler, Valery V. Tuchin, and Dennis L. Matthews. SPIE, 2010. http://dx.doi.org/10.1117/12.854065.

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Keyser, Christian, Khanh Nguyen, Arielle Adams, and Richard Martin. "Single-Pulse Mueller Matrix Polarimeter Laboratory Demonstration." In 2018 IEEE Research and Applications of Photonics In Defense Conference (RAPID). IEEE, 2018. http://dx.doi.org/10.1109/rapid.2018.8508959.

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Kim, Arnold D., Akira Ishimaru, and Yasuo Kuga. "Polarimetric pulse propagation through discrete random media." In Optoelectronics '99 - Integrated Optoelectronic Devices, edited by Yehuda B. Band. SPIE, 1999. http://dx.doi.org/10.1117/12.351047.

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Reports on the topic "Pulsar polarimetry"

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Kimura, Wayne D. Distributed Magnetic Measurements Using Fiber Optic Pulsed Polarimetry - Final Report. Office of Scientific and Technical Information (OSTI), May 2019. http://dx.doi.org/10.2172/1523408.

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Smith, Roger J. Internal field, density & temperature measurements in MTF plasmas using Pulsed Polarimetry. Office of Scientific and Technical Information (OSTI), August 2014. http://dx.doi.org/10.2172/1149491.

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Smith, Roger J. Internal Magnetic Field, Temperature and Density Measurements on Magnetized HED plasmas using Pulsed Polarimetry. Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1336900.

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Apte, Zachary. Balloon-Borne Gamma-Ray Polarimeter (PoGO) to Study Black Holes, Pulsars, and AGN Jets: Design and Calibration(SULI). Office of Scientific and Technical Information (OSTI), December 2005. http://dx.doi.org/10.2172/877479.

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