1. Department of Surgical Sciences Uppsala University Uppsala Sweden
2. Department of Surgery University Hospital Uppsala Sweden
3. Department of Psychology Lund University Lund Sweden
4. Childhood Obesity Unit Skåne University Hospital Malmö Sweden
5. Department of Pediatrics Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg Gothenburg Sweden
6. Department of Pediatrics Region Västra Götaland, Sahlgrenska University Hospital Gothenburg Sweden
7. Department of Food Studies Nutrition and Dietetics Uppsala University Uppsala Sweden
8. Department of Medicine (Solna) Clinical Epidemiology Division Karolinska Institutet Stockholm Sweden
9. Center for Obesity, Academic Specialist Center Stockholm Health Services Stockholm Sweden