Dimitrios Hatzichristou, MD, PhD, FECSM, is Professor of Urology of Aristotle University of Thessaloniki, Greece. He is also President of the Institute for the Study of Urological Diseases (ISUD), a non profit organization, dedicated to education and awareness on Urological conditions. He received his MD and Ph.D. degrees and completed his training in Urology at Aristotle University in Thessaloniki, Greece. Then, he completed a 2-year fellowship in Andrology at Boston University, Boston, USA and then he worked as visiting scholar (prostate diseases) for a year at Stanford University, California, USA. Prof. Hatzichristou organized and chaired the foundation meeting of the European Society for Sexual Medicine in 1995, served as Secretary General (1995-97), President Elect (1999-2001) and President (2001-2004) of ESSM. He has been also a faculty member of the European School of Urology (ESU), founding member of the European Society of Andrological Urology (ESAU), member of the Executive Committee of the International Society for Sexual Medicine (ISSM), the EAU Committee for the guidelines on erectile dysfunction (2004-2014) and co-chairman of the Committee on “Diagnostics and Scales in Sexual Medicine” of the International Consultation in Sexual Medicine since 2004. Dr Hatzichristou has served as Review and Educational Editor for the Journal of Sexual Medicine and the Journal for Impotence Research, Editorial board member for Urologia Internationalis and the Journal for Sexual and Reproductive Medicine, and reviewer in major scientific journals, including European Urology, Journal of Urology, International British Journal of Urology. He has been invited speaker in more than 250 international meetings and teaching courses worldwide. He has authored 25 book chapters in international books, as well as more than 120 review and peer-review papers with more than 15000 citations (h-factor=51).