[This corrects the article DOI: 10.2196/28253.].
©Konrad Krawczyk, Tadeusz Chelkowski, Daniel J Laydon, Swapnil Mishra, Denise Xifara, Benjamin Gibert, Seth Flaxman, Thomas Mellan, Veit Schwämmle, Richard Röttger, Johannes T Hadsund, Samir Bhatt. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 14.07.2021.