1. Department of Obstetrics and Gynaecology Seoul National University College of Medicine Seoul Korea
2. Department of Biostatistics Seoul National University Seoul Metropolitan Government Boramae Medical Centre Seoul Korea
3. Institute of Forensic and Anthropological Science Medical Research Centre Seoul National University Seoul Korea
4. Institute of Reproductive Medicine and Population Medical Research Centre Seoul National University Seoul Korea
5. Department of Forensic Medicine Seoul National University College of Medicine Seoul Korea