[This corrects the article DOI: 10.2196/11029.].
Keywords: circadian rhythm; digital phenotype; machine learning; mood disorder; prediction; wearable device.
©Chul-Hyun Cho, Taek Lee, Min-Gwan Kim, Hoh Peter In, Leen Kim, Heon-Jeong Lee. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 03.10.2019.