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. 2015 Apr 16;15:48. doi: 10.1186/s12877-015-0049-5

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© Tejima et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Shema of videoendoscopic swallowing provocation test. The arrow(→) indicated the position of the apex of fibroscope with 5Fr catheter for injection of water.