1. Copenhagen Research Center for Mental Health, University of Copenhagen, Copenhagen (Høgh Egmose, Heinsvig Poulsen, Hjorthøj, Skriver Mundy, Hellström, Nørgaard Nielsen, Falgaard Eplov); Department of Public Health, Section of Epidemiology, University of Copenhagen, Copenhagen (Hjorthøj); Mental Health Services, Region of Southern Denmark, Odense (Korsbek); Peer Partnership Association, Social Network Association, Copenhagen (Serup Rasmussen).