[1] Kwong Wah Hosp, Div Urol, Dept Surg, Hong Kong, Hong Kong, Peoples R China
[2] Cleveland Clin, Amer Ctr Reprod Med, Mail Code X-11,10681 Carnegie Ave, Cleveland, OH 44195 USA
[3] Hamad Med Corp, Dept Urol, Doha, Qatar
[4] Referral Ctr Male Reprod, Androl & Human Reprod Clin, ANDROFERT, Campinas, SP, Brazil