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. 2019 Sep 6;21(9):e13345. doi: 10.2196/13345

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©Austin Lee Chiang, Loren Galler Rabinowitz, Akhil Kumar, Walter Wai-Yip Chan. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 06.09.2019.

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.

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graphic file with name jmir_v21i9e13345_fig3.jpg — Receiver operating characteristic curve for different follower cutoffs. ROC: receiver operating characteristic.