[1] Univ Indonesia, Dr Cipto Mangunkusumo Natl Referral Hosp, Fac Med, Dept Obstet & Gynecol, Jl Diponegoro 71, Jakarta 10310, Indonesia
[2] Univ Indonesia, Dept Community Med, Fac Med, Jakarta, Indonesia
[3] Univ Indonesia, Dr Cipto Mangunkusumo Natl Referral Hosp, Fac Med, Dept Anesthesiol & Intens Care, Jakarta, Indonesia
[4] Univ Indonesia, Dr Cipto Mangunkusumo Natl Referral Hosp, Fac Med, Dept Surg, Jakarta, Indonesia
[5] Univ Indonesia, Dr Cipto Mangunkusumo Natl Referral Hosp, Fac Med, Dept Urol, Jakarta, Indonesia