Facilitators and barriers for return to work among patients with post-COVID-19 condition: a qualitative interview study - Sulg Aleksandra; Malmivaara Antti; Liira Helena; Arokoski Jari; Kvarnström Kirsi; Varonen Mikko; HUS Shared Group Services; University of Helsinki; Orton; HUS Internal Medicine and Rehabilitation; Clinicum (Scandinavian Journal of Primary Health Care, 2025)