1. Department of Obstetrics and Gynecology CHA Bundang Medical Center CHA University School of Medicine Seongnam Korea
2. Integrated Research Center for Fetal Medicine Department of Gynecology and Obstetrics Johns Hopkins University School of Medicine Baltimore MD USA
3. Department of Biomedical Science College of Life Science CHA University Seongnam Korea
4. Department of Neurology Johns Hopkins University School of Medicine Baltimore MD USA