1. School of Biological Sciences and Institute of Molecular Biology and Genetics, Seoul National University, Kwanak-gu, Shinlim-dong, Seoul 151-742,1
2. Department of Pharmacology and Institute of Natural Medicine, College of Medicine, Hallym University, Chunchon 200-702,2
3. Hormone Research Center, Chonnam National University, Kwangju 500-757,3
4. Institute of Human Genetics and Department of Anatomy, College of Medicine, Korea University, Seoul 136-705, 4 and
5. School of Medicine, Sung Kyun Kwan University, Suwon 440-746, 5 Republic of Korea