Corrigenda and Addenda
doi:10.2196/jmir.9728
This correction notice was retracted on May 10, 2018, as it was mistakenly published in J Med Internet Res rather than JMIR Public Health Surveill.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 16.03.18.
Copyright©Nao Ueda, Ryoki Yokouchi, Taro Onoda, Atsushi Ogihara. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 16.03.2018.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.