Trends in Mental Health Outcomes of College Students Amid the Pandemic (Roadmap mHealth App): Longitudinal Observational Study - Gautham Jayaraj; Xiao Cao; Adam Horwitz; Michelle Rozwadowski; Skyla Shea; Shira N Hanauer; David A Hanauer; Muneesh Tewari; Kerby Shedden; Sung Won Choi (Journal of Medical Internet Research)