1. Childhood Obesity Unit; Skåne University Hospital; Malmö Sweden
2. Department of Psychology; Lund University; Lund Sweden
3. Centre for Health Care Sciences, Faculty of Medicine and Health; Örebro University; Örebro Sweden
4. Department of Surgery; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
5. National Institute for Health and Welfare; Helsinki Finland
6. Department of Clinical Science; Intervention and Technology, Karolinska Institutet; Stockholm Sweden
7. Department of Pediatrics; Sahlgrenska University Hospital; Gothenburg Sweden