1. The Korean Liver Cancer Study Group; Yonsei University College of Medicine; Seoul Korea
2. Department of Internal Medicine, International St. Mary's Hospital; Catholic Kwandong University College of Medicine; Incheon Metropolitan City Korea
3. Institute for Integrative Medicine, International St. Mary's Hospital; Catholic Kwandong University College of Medicine; Incheon Metropolitan City Korea
4. Departments ofInternal Medicine; Yonsei University College of Medicine; Seoul Korea
5. Department of Biostatistics; Yonsei University College of Medicine; Seoul Korea