1. National Creative Research Initiatives Center for Cardiac Regeneration and Institute of Cardiovascular Research, Chonbuk National University School of Medicine, Chonju, 560-180, Korea
2. Department of Anatomy, Institute of Human Genetics and Graduate School of Biotechnology, Korea University, Seoul, 136-705, Korea
3. Department of Microbiology and Immunology, Chosun University Dental School, Kwangju, 501-759, Korea
4. Department of Internal Medicine, Chonbuk National University School of Medicine, Chonju, 560-180, Korea