1. Health Promotion, Steno Diabetes Center Copenhagen, The Capital Region of Denmark, Niels Steensens Vej 6, Gentofte, Denmark
2. Center for Outdoor Recreation and Education, University of Copenhagen, Noedebevej 77A, Fredensborg, Denmark
3. National Institute of Public Health, University of Southern Denmark, Studiestræde 6, Copenhagen, Denmark
4. Department of Learning and Philosophy, Center for Youth Research, Aalborg University, A.C. Meyersvænge 15, Copenhagen, Denmark
5. MRC Developmental Pathways for Health Research Unit, University of the Witwatersrand, Private Bag 3, WITS, South Africa