[1] Nagoya City Univ, Grad Sch Med Sci, Dept Clin Mol Informat Med, Nagoya, Aichi 4678601, Japan
[2] Nagoya City Univ, Grad Sch Med Sci, Dept Internal Med & Mol Sci, Nagoya, Aichi 4678601, Japan
[3] Teinekeijinkai Hosp, Sappolo, Japan
[4] Sapporo Kosei Gen Hosp, Sappro, Japan
[5] Akita City Hosp, Akita, Japan
[6] Iwate Med Univ, Morioka, Iwate 020, Japan
[7] Shinshu Univ, Grad Sch Med, Matsumoto, Nagano 390, Japan
[8] Univ Yamanashi, Yamanashi, Japan
[9] Juntendo Univ, Sch Med, Shizuoka Hosp, Dept Gastroenterol, Shizuoka, Japan
[10] Musashino Red Cross Hosp, Tokyo, Japan
[11] Showa Univ, Fujigaoka Hosp, Yokohama, Kanagawa 227, Japan
[12] Hepatitis Res Inst, Tokorozawa, Saitama, Japan
[13] Kiyokawa Hosp, Tokyo, Japan
[14] St Marianna Univ, Sch Med, Kawasaki, Kanagawa, Japan
[15] Aichi Med Univ, Sch Med, Aichi, Japan
[16] Gifu Municipal Hosp, Gifu, Japan
[17] Osaka City Univ, Osaka 558, Japan
[18] Tottori Univ, Tottori 680, Japan
[19] Yamaguchi Univ, Sch Med, Yamaguchi, Japan
[20] Ehime Univ, Sch Med, Matsuyama, Ehime, Japan
[21] Natl Hosp Org, Nagasaki Med Ctr, Nagasaki, Japan
[22] Kurume Univ, Sch Med, Kurume, Fukuoka 830, Japan
[23] Miyakawa Mem Res Fdn, Tokyo, Japan
[24] Kyoto Prefectural Univ Med, Kyoto, Japan