[This corrects the article DOI: 10.2196/20285.].
©Dianbo Liu, Leonardo Clemente, Canelle Poirier, Xiyu Ding, Matteo Chinazzi, Jessica Davis, Alessandro Vespignani, Mauricio Santillana. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 22.09.2020.