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. 2016 May 12;2(1):e19. doi: 10.2196/publichealth.4831

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©Yuya Sugawara, Hiroto Narimatsu, Atsushi Tsuya, Atsushi Tanaka, Akira Fukao. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 12.05.2016.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Public Health and Surveillance, is properly cited. The complete bibliographic information, a link to the original publication on http://publichealth.jmir.org, as well as this copyright and license information must be included.

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Number of accounts by medical specialty tweeting content categorized as follows: medical knowledge; consultation guidance including advertisements and newsletters from medical institutions; suggestions from patients; links only to homepages, blogs, and others; individual behavior or thinking; and tweets including multiple types of content.