1. Göteborg Pediatric Growth Research Center, Department of Pediatrics, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
2. Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
3. Department of Endocrinology, Region Västra Götaland, Queen Silvia Children´s Hospital, Sahlgrenska University Hospital, Gothenburg, Sweden