Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC 3168, Australia; Department of Medicine and Australian Institute of Musculoskeletal Science, Melbourne Medical School-Western Campus, the University of Melbourne, St Albans, VIC 3021, Australia. Electronic address: david.scott@monash.edu. Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umeå SE-901 87, Sweden; Department of Community Medicine, UiT the Arctic University of Norway, Tromsø 9010, Norway. Department of Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC 3168, Australia. Department of Community Medicine and Rehabilitation, Geriatric Medicine, Umeå University, Umeå SE-901 87, Sweden. Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umeå SE-901 87, Sweden; School of Sport Sciences, UiT the Arctic University of Norway, Tromsø 9010, Norway.