1 Division of Epidemiology and Public Health Intervention Research (EPHIR), Department of Public Health Sciences, Karolinska Institutet , Solna , Sweden.
2 Department of Physical Education and Sport Sciences, University of Limerick, Limerick, Ireland; Health Research Institute (HRI), University of Limerick, Limerick, Ireland.
3 Behavioural Epidemiology Laboratory, Baker IDI Heart and Diabetes Institute , Melbourne, VIC , Australia.
4 Physical Activity Laboratory, Baker IDI Heart and Diabetes Institute, Melbourne, VIC, Australia; Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, VIC, Australia.
5 The Swedish School of Sport and Health Sciences (GIH) , Stockholm , Sweden.