[1] Kaohsiung Med Univ, Grad Inst Med, Ctr Excellence Environm Med, Kaohsiung 812, Taiwan
[2] Kaohsiung Med Univ, Dept Obstet & Gynecol, Kaohsiung Municipal Hsiao Kang Hosp, Kaohsiung 812, Taiwan
[3] Kaohsiung Med Univ, Dept Urol, Kaohsiung Med Univ Hosp, Kaohsiung 812, Taiwan
[4] Chi Mei Fdn Hosp, Dept Obstet & Gynecol, Tainan, Taiwan
[5] Chang Gung Univ, Dept Urol, Gung Mem Hosp, Kaohsiung, Taiwan
[6] Kaohsiung Med Univ, Dept Obstet & Gynecol, Kaohsiung Med Univ Hosp, Kaohsiung 812, Taiwan