1. Health Promotion Research, Copenhagen University Hospital—Steno Diabetes Center Copenhagen , Borgmester Ib Juuls Vej 83 , 2730 Herlev, Denmark
2. National Institute of Public Health, University of Southern Denmark, Studiestræde 6, 1455 Copenhagen K, Denmark
3. SA MRC Developmental Pathways for Health Research Unit, Faculty of Health Sciences, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein 2000, Johannesburg, South Africa
4. The University of Sydney School of Public Health, Edward Ford Building, A27 Fisher Rd, University of Sydney NSW 2006, Australia
5. Department of psychology and neuroscience, Dalhousie University, 1355 Oxford St, Halifax, NS B3H 4J1, Canada
6. Department of Public Health, University of Copenhagen, Øster Farimagsgade 5, 1353 Copenhagen K, Denmark