1. Department of Internal Medicine; Yonsei University College of Medicine; Seoul Korea
2. Institute of Gastroenterology; Yonsei University College of Medicine; Seoul Korea
3. Liver Cirrhosis Clinical Research Center; Yonsei University College of Medicine; Seoul Korea
4. Department of Pathology; Yonsei University College of Medicine; Seoul Korea
5. Brain Korea 21 Project of Medical Science; Yonsei University College of Medicine; Seoul Korea