1. Aesthetic, Plastic, & Reconstructive Surgery Center, Good Moonhwa Hospital, Busan 614-847, Korea.
2. S&M Research Institute, Good Moonhwa Hospital, Busan 614-847, Korea.
3. Center for Reproductive Medicine, Good Moonhwa Hospital, Busan 614-847, Korea.
4. Department of Physiology, School of Medicine, Pusan National University, Yangsan 626-790, Korea.