1. Institute of Endocrinology Lithuanian University of Health Sciences Kaunas Lithuania
2. Medical Academy Lithuanian University of Health Sciences Kaunas Lithuania
3. Department of Laboratory Medicine Lithuanian University of Health Sciences Kaunas Lithuania
4. Pediatric Endocrine and Diabetes Unit, Department of Pediatrics, Gynecology and Obstetrics University Hospitals of Geneva Geneva Switzerland
5. Diabetes Center of the Faculty of Medicine University of Geneva Geneva Switzerland