[This corrects the article DOI: 10.2196/11002.].
©Ashley E E Mason, Laura Saslow, Patricia J Moran, Sarah Kim, Priyanka K Wali, Hiba Abousleiman, Alison Hartman, Robert Richler, Samantha Schleicher, Wendy Hartogensis, Elissa S Epel, Frederick Hecht. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 13.01.2020.