Moderated digital social therapy for young people with emerging mental health problems: A user-centered mixed-method design and usability study. - Marilon van Doorn; Anne Monsanto; Cato M. Boeschoten; Thérèse van Amelsvoort; Arne Popma; Ferko G. Öry; Mario Alvarez-Jimenez; John F. M. Gleeson; Monique W. M. Jaspers; Dorien H. Nieman (Frontiers Digit. Health, 2022)