[1] Med Univ Graz, Dept Obstet & Gynecol, A-8036 Graz, Austria
[2] Herlev Univ Hosp, Dept Obstet & Gynecol, Copenhagen, Denmark
[3] Univ Hosp Ctr Rijeka, Dept Gynecol & Obstet, Rijeka, Croatia
[4] Sahlgrens Univ Hosp, Dept Oncol, Gothenburg, Sweden
[5] Univ Leipzig, Dept Social Med, Leipzig, Germany
[6] Natl Taiwan Univ, Dept Publ Hlth, Taipei 10764, Taiwan
[7] Natl Taiwan Univ, Inst Preventat Med, Taipei 10764, Taiwan
[8] Queen Elizabeth Queen Mother Hosp, E Kent Gynaecol Oncol Ctr, Margate, England