1. Department of Gastroenterology and Hepatology; Yokohama City University Graduate School of Medicine; Yokohama Japan
2. Department of Virology and Liver Unit; Nagoya City University Graduate School of Medical Sciences; Nagoya Japan
3. Schiff Center for Liver Diseases; University of Miami Miller School of Medicine; Miami Florida USA
4. Department of Psychiatry; Yokohama City University Graduate School of Medicine; Yokohama Japan