1. Faculty of Medicine, Medical Academy, Lithuanian University of Health Sciences, LT-44307 Kaunas, Lithuania
2. Hospital of Lithuanian University of Health Sciences Kauno Klinikos, LT-50161 Kaunas, Lithuania
3. Institute of Endocrinology, Medical Academy, Lithuanian University of Health Sciences, LT-50009 Kaunas, Lithuania
4. Clinic of Internal Medicine, Family Medicine and Oncology, Faculty of Medicine, Vilnius University, LT-08661 Vilnius, Lithuania
5. Center of Family Medicine, Vilnius University Hospital Santaros Klinikos, LT-08661 Vilnius, Lithuania
6. Faculty of Medicine, Vilnius University, LT-08661 Vilnius, Lithuania