1. Department of Internal Medicine, Endocrinology Section, Clinical Centre of Montenegro, Ljubljanska bb, Podgorica, Montenegro
2. Faculty of Medicine, University of Montenegro, Kruševac bb, Podgorica, Montenegro
3. Division of Endocrinology, Department of Internal Medicine, Erasmus Medical Centre, Rotterdam, the Netherlands
4. Wellcome-MRC Institute of Metabolic Science, University of Cambridge and Addenbrooke’s Hospital, Cambridge, United Kingdom