Manuela Simoni1, Marie-Claude Hofmann2. 1. Unit of Endocrinology, Center of Excellence in Andrology and Sexual Medicine, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy. 2. Department of Endocrine Neoplasia and Hormonal Disorders, University of Texas MD Anderson Cancer Center, Houston, TX, USA.