1. Unit of Endocrinology, Scientific Institute “Casa Sollievo della Sofferenza” San Giovanni Rotondo, Foggia, Italy
2. Unit of Endocrinology and Metabolic Diseases, Department of Medical Sciences, University of Foggia, Italy
3. Unit of Nephrology, Department of Molecular Medicine, University of Foggia, Italy
4. Department of Clinical Sciences, University “ La Sapienza,“ Rome, Italy