Received: 20 March 2021
Accepted: 17 August 2021
First Online: 6 September 2021
: The RADAR-MDD project received ethical approval in the United Kingdom from the Camberwell St Giles Research Ethics Committee (REC reference: 17/LO/1154); and Spain from the CEIC Fundació Sant Joan de Déu (CI reference: PIC-128-17) and in The Netherlands from the Medische Ethische Toetsingscommissie VUmc (METc VUmc registratienummer: 2018.012 – NL63557.029.17). The research was undertaken in accordance with the Declaration of Helsinki, and all participants provided informed consent to participate.
: Not applicable.
: WJHP has received (non-related) research grants from Jansen Research and Boehringer Ingelheim. DCM has received consulting fees and honoraria from Apple Inc., Otsuka Pharmaceuticals, Pear Therapeutics. Has ownership interest in Adaptive Health, Inc.