1. University Medical Centre Ljubljana, University Children’s Hospital, Department of Pediatric Endocrinology, Diabetes and Metabolic Diseases, Bohoriceva 20, 1000 Ljubljana, Slovenia
2. University of Ljubljana, Faculty of Medicine, Vrazov trg 2, 1000 Ljubljana, Slovenia
3. Universitätsklinikum Ulm, Eythstr. 24, 89070 Ulm, Germany