1. Department of Obstetrics and Gynecology, B.P. Koirala Institute of Health Sciences, Dharan, Nepal.
2. Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital at Linkou, Kweishan, Taoyuan, Taiwan.
3. Chang Gung University College of Medicine, Kweishan, Taoyuan, Taiwan.
4. Department of Obstetrics and Gynecology, St. Luke's Medical Center Quezon City and Global City, Metro Manila, Philippines.