Silalahi, E.R., Doctoral Program in Medical Sciences, Faculty of Medicine, Universitas Indonesia, Indonesia; Wibowo, N., Department of Obstetrics and Gynecology, Faculty of Medicine, Universitas Indonesia – Cipto Mangunkusumo Hospital, Indonesia; Prasmusinto, D., Department of Obstetrics and Gynecology, Faculty of Medicine, Universitas Indonesia – Cipto Mangunkusumo Hospital, Indonesia; Djuwita, R., Department of Epidemiology, Faculty of Public Health, Universitas Indonesia, Indonesia; Rengganis, I., Department of Internal Medicine, Faculty of Medicine, Universitas Indonesia – Cipto Mangunkusumo Hospital, Indonesia; Mose, J.C., Department of Obstetrics and Gynecology, Faculty of Medicine, Universitas Padjadjaran – Hasan Sadikin Hospital, Indonesia