Detection of Depressive Symptoms in College Students Using Multimodal Passive Sensing Data and Light Gradient Boosting Machine: Longitudinal Pilot Study - Jessica L Borelli; Yuning Wang; Frances Haofei Li; Lyric N Russo; Marta Tironi; Ken Yamashita; Elayne Zhou; Jocelyn Lai; Brenda Nguyen; Iman Azimi; Christopher Marcotullio; Sina Labbaf; et al. (JMIR Formative Research)