1. The Children's Obesity Clinic, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark.
2. The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, The Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
3. The Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
4. The Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.