1. Department of Andrology and IVF; San Carlo Clinic; Paderno-Dugnano/Milano Italy
2. Department of Life, Health and Environmental Sciences; University of L’ Aquila; L’ Aquila Italy
3. Department of Dermatology/Andrology Unit; University of Bonn; Bonn Germany
4. Department of Translational Medicine and Reproductive Medicine Centre; Lunds University and Skane University Hospital; Malmö Sweden
5. Center for Reproductive Medicine and Andrology; University Hospital; Martin Luther University Halle-Wittenberg; Halle Germany
6. Unit of Reproductive Endocrinology; 1st Department of Obstetrics and Gynecology; Medical School; Aristotle University of Thessaloniki; Thessaloniki Greece
7. Department of Experimental and Clinical Biomedical Sciences ‘Mario Serio’; Centre of Excellence DeNothe; University of Florence; Florence Italy