Physical activity and depressive symptoms: is a healthy body necessary for a healthy mind? (Nikolaos Stavrakakis) Master Your Mood: Online depression treatment for adolescents and young adults: effectiveness, mechanisms of change and language use as psychological marker (Rianne van der Zanden) Out of the box: moving from categories to dimensions in the phenomenology of depression and anxiety (Margien E. den Hollander-Gijsman) Turning depression inside out: Life events, cognitive emotion regulation and treatment in adolescents (Yvonne Stikkelbroek)