1. Research Centre for Endocrinology and Metabolism, Department of Internal Medicine, and Göteborg Pediatric Growth Research Center, Department of Pediatrics, Sahlgrenska University Hospital, Göteborg, Sweden.
2. Göteborg Pediatric Growth Research Center, Department of Pediatrics, Sahlgrenska University Hospital, Göteborg, Sweden
3. Department of Pharmacology and Physiology, Göteborg University, Göteborg, Sweden
4. Centre for Endocrinology and Metabolism, Department of Internal Medicine, Sahlgrenska University Hospital, Göteborg, Sweden.