Andrea Lenzi is Full Professor of Endocrinology in the Department of Experimental Medicine, University of Rome “Sapienza”, Rome, Italy. He is Director of the Unit of Andrology, Reproductive Physiopathology, and Endocrine Diagnosis and Coordinator of Laboratories of Endocrinology at the Policlinico Umberto I University Hospital, Rome, Italy. Dr. Lenzi is President of the Italian National University Council and Director of the Interuniversity Research Centre for Experimental Andrology (CASPER). He has served as Secretary General of the International Society for Immunology of Reproduction (1999-2004), the Alps-Adria Society for Immunology of Reproduction (1998-2001), and the Executive Council of the European Academy of Andrology (2002-2010). Dr. Lenzi has also been President of the Italian Society of Andrology and Medical Sexology (2008-2010). He is a member of the editorial boards of several international scientific journals and has published more than 220 original papers in the main international journals in the field.Silvia Migliaccio is Researcher in the Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, Rome, Italy. He is Coordinator of the Unit of Osteoporosis and Bone Metaboli Diseases t the Policlinico Umberto I University Hospital, Rome Italy. Dr. Migliaccio’s many previous positions have included Visiting Asoociate at the National Institute of Environmental Health Sciences, North Carolina, USA. She has served as Member of the Executive Council of the Italian Society of Osteoporosis and Skeletal Diseases (SIOMMMS) and she is member of the Executive Council of the Italian Society of Nutrition (S.I.S.A.). She has published more than 100 original papers in the main international and national journals in the field of skeletal metabolism, nutrition and metabolic disorders.