Affiliation: | 1.Division of Urology, Department of Surgery, Kwong Wah Hospital, 25 Waterloo Road, Yau Ma Tei, Hong Kong;2.ANDROFERT, Center for Male Reproduction, Av. Dr. Heitor Penteado 1464, Campinas, SP 13075-460, Brazil;3.American Center for Reproductive Medicine, 10681 Carnegie Avenue, X-11, Cleveland, OH 44195, USA |