[1] Osaka Univ, Osaka, Japan
[2] Hokkaido Univ, Sapporo, Hokkaido 060, Japan
[3] Kurume Univ, Sch Med, Fukuoka, Japan
[4] Hikarigaoka Spellman Hosp, Sendai, Miyagi, Japan
[5] Osaka City Univ, Osaka 558, Japan
[6] Nagoya Univ, Nagoya, Aichi 4648601, Japan
[7] Natl Hosp Org, Mie Chuo Med Ctr, Tsu, Mie, Japan
[8] Kyoto Univ, Kyoto, Japan
[9] Nagoya Med Ctr, Nagoya, Aichi, Japan
[10] Tokyo Med & Dent Univ, Tokyo, Japan
[11] Chiba East Natl Hosp, Natl Hosp Org, Chiba, Japan
[12] Jichi Med Univ, Shimotsuke, Tochigi, Japan
[13] Sapporo City Gen Hosp, Sapporo, Hokkaido, Japan
[14] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan
[15] Dogo Spa Hosp, Matsuyama, Ehime, Japan
[16] Nagoya Rheumatol Clin, Nagoya, Aichi, Japan
[17] Keio Univ, Tokyo, Japan
[18] Univ Tokyo, Tokyo, Japan
[19] Tokyo Womens Med Univ, Tokyo, Japan
[20] Chugai Pharmaceut, Tokyo, Japan