[1] Nagasaki Med Ctr, NHO, Clin Res Ctr, Nagasaki 8568562, Japan
[2] Nagasaki Univ, Grad Sch Biomed Sci, Dept Hepatol, Nagasaki 852, Japan
[3] Kyushu Univ, Grad Sch Med Sci, Fukuoka 812, Japan
[4] Univ Calif Davis, Sch Med, Genome & Biomed Sci Facil, Div Rheumatol Allergy & Clin Immunol, Davis, CA 95616 USA