1 Endocrinology Section, Department of Clinical and Experimental Medicine, University of Catania, 95122, Catania, Italy. lucia.frittitta@unict.it.
2 Diabetes and Obesity Center, Garibaldi Hospital, Catania, Italy. lucia.frittitta@unict.it.
3 Health and Environmental Group, Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK.