1. Department of Surgical and Perioperative Sciences, Sports Medicine (P.N., A.N.), Umeå University, 901 85 Umeå, Sweden
2. Department of Community Medicine and Rehabilitation, Geriatrics (P.N.), Umeå University, 901 85 Umeå, Sweden
3. Obesity Unit M73 (M.N.), Department of Medicine, Karolinska Institute, Karolinska University Hospital, 171 77 Stockholm, Sweden
4. Department of Community Medicine and Rehabilitation, Rehabilitation Medicine (A.N.), Umeå University, 901 85 Umeå, Sweden