1. CHA Cancer Research Institute, CHA University, Seoul, 135-081, South Korea
2. Laboratory of Cell Regulation and Carcinogenesis, Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon, 406-840, South Korea
3. Department of Internal Medicine, Bundang CHA General Hospital, College of Medicine, CHA University, Seongnam, 463-712, South Korea
4. Department of Pediatrics, Case Western Reserve University, Cleveland, OH 44195, U.S.A.