[1] Gunma Univ, Grad Sch Med, Maebashi, Gunma, Japan
[2] Kobe Univ, Grad Sch Med, Kobe, Hyogo, Japan
[3] Immunobiol Labs, Fujioka, Japan
[4] Imamura Enzyme Technol Lab, Shizuoka, Japan
[5] Hidaka Hosp, Takasaki, Gunma, Japan
[6] Kanazawa Med Univ, Kanazawa, Ishikawa, Japan