1. Department of Urology, First affiliated hospital of Anhui medical university, Hefei, China
2. Department of Andrology, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, China
3. Department of Andrology, Peking University Third Hospital, Beijing, China
4. Chair of Endocrinology & Medical Sexology (ENDOSEX), Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy