A Mobile Intervention for Self-Efficacious and Goal-Directed Smartphone Use in the General Population: Randomized Controlled Trial.
Jan KellerChristina RoitzheimTheda RadtkeKonstantin SchenkelRalf SchwarzerPublished in: JMIR mHealth and uHealth (2021)
German Clinical Trials Register DRKS00017606; https://tinyurl.com/27c9kmwy.