1. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.
2. Diagnostic DNA Chip Center, Seoul National University College of Medicine, Seoul, Korea.
3. Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea.
4. Department of Internal Medicine, Seoul Municipal Boramae Hospital, Seoul National University College of Medicine, Seoul, Korea.
5. Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, Korea.