1. Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology Sapienza University of Rome Rome Italy
2. Department of Clinical and Experimental Sciences Unit of Endocrinology and Metabolism University of Brescia Brescia Italy
3. Unit of Andrology and Reproductive Medicine Department of Medicine University of Padova Padova Italy
4. Sexual Medicine and Andrology Dipartimento Scienze Biomediche Sperimentali e Cliniche ‘Mario Serio’ University of Florence Firenze Italy
5. Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia Università Federico II di Napoli Naples Italy
6. Department of Biomedical, Metabolic and Neural Sciences University of Modena and Reggio Emilia Modena Italy
7. Endocrinology, Department of Clinical and Molecular Sciences Polytechnic University of Marche Ancona Italy
8. Andrology Unit Department of Medical, Surgical, Neurological, Metabolic and Aging Sciences University HospitalL. Vanvitelli University of Campania Naples Italy
9. Andrology Unit Division of Endocrinology, Diabetology and Metabolism Department of Medical Sciences University of Turin Torino Italy
10. Service of Medical Statistics and Information Technology Fatebenefratelli Foundation for Health Research and Education Rome Italy