1. Biomedical Research Institute and Department of Biochemistry & Molecular Biology, College of Medicine, Hanyang University, 17 Haengdang-Dong, Sungdong-Gu, Seoul 133-791, Republic of Korea
2. Department of Biology and Medicinal Science, College of Sciences and Technology, Pai Chai University, Daejeon 302-735, Republic of Korea
3. Department of Obstetrics and Gynecology, College of Medicine, Hanyang University, Guri Hospital, Guri City 471-701, Gyeonggi-Do, Republic of Korea