1. Department of Obstetrics and Gynecology, Cheil General Hospital and Women’s Healthcare Center, Kwandong University College of Medicine, Seoul, Korea
2. Laboratory of Medical Genetics, Cheil Medical Research Institute, Cheil General Hospital and Women’s Healthcare Center, Seoul, Korea
3. Department of Radiology, Cheil General Hospital and Women’s Healthcare Center, Kwandong University College of Medicine, Seoul, Korea