Course of well-being and mental health in Switzerland during the COVID-19 pandemic: results of a national survey within the framework of the COH-FIT study. - Huber CG; Billian J; Ziltener T; Conus P; von Känel R; Hasler G; Sehli J; Mosina A; Krinitski D; Seifritz E; Kowalinski E; Gothuey I; et al. (Frontiers in psychiatry, 2026)