1. Department of Obstetrics and Gynecology, Seoul National University, Seoul, South Korea, Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul, South Korea
2. Department of Obstetrics and Gynecology, Seoul National University, Seoul, South Korea, Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul, South Korea,
3. Center for Reproductive Medicine and Infertility, Cornell Weill Medical College, New York, NY, USA
4. Rockefeller University, New York, NY, USA
5. Department of Anatomy, Seoul National University, Seoul, South Korea
6. Department of Pathology, College of Medicine, Seoul National University, Seoul, South Korea
7. Department of Obstetrics and Gynecology, Seoul National University, Seoul, South Korea