1. Health Screening & Promotion Center, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
2. Department of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
3. Asan Institute for Life Science, University of Ulsan College of Medicine, Asan Medical Center;.
4. DNA Link, Inc., Seoul, Korea.