Corrigenda and Addenda
This correction notice was retracted on May 10, 2018, as it was mistakenly published in J Med Internet Res rather than JMIR Public Health Surveill. For details, please see the retraction statement included in the new correction notice (JMIR Public Health Surveill 2018;4(2):e10878).
Edited by G Eysenbach; This is a non–peer-reviewed article. submitted 24.12.17; accepted 10.01.18; published 16.03.18Copyright
©Nao Ueda, Ryoki Yokouchi, Taro Onoda, Atsushi Ogihara. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 16.03.2018.
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