1. Department of Pathology, College of Medicine and Microdissection Genomics Research Center, The Catholic University of Korea, Banpo-dong #505, Seocho-gu, Seoul 137-701, Republic of Korea, Department of Pathology, College of Medicine, Seoul National University, Seoul 137-701, Republic of Korea, and Cellular and Molecular Toxicology Lab, Korea Institute of Science and Technology, Seoul 130-650, Republic of Korea