1. Departments of Obstetrics and Gynecology (J.Y.K., M.K.K.), Cheil General Hospital and Women’s Healthcare Center, Kwangdong University College of Medicine, Seoul, Korea 100-380
2. Department of Pathology (J.Y.K., I.S.K.), Korea University College of Medicine, Seoul, Korea 136-701
3. Laboratory of Reproductive Biology and Infertility (H.S., H.K., H.J.K., J.H.J.), Cheil General Hospital and Women’s Healthcare Center, Kwangdong University College of Medicine, Seoul, Korea 100-380
4. Pathology (S.R.H), Cheil General Hospital and Women’s Healthcare Center, Kwangdong University College of Medicine, Seoul, Korea 100-380