A Blended Learning Course on the Diagnostics of Mental Disorders: Multicenter Cluster Randomized Noninferiority Trial - Gabriel Bonnin; Svea Kröber; Silvia Schneider; Jürgen Margraf; Verena Pflug; Alexander L Gerlach; Timo Slotta; Hanna Christiansen; Björn Albrecht; Mira-Lynn Chavanon; Gerrit Hirschfeld; Tina In-Albon; et al. (Journal of Medical Internet Research)