[1] UNIV TOKYO,FAC MED,DEPT IMMUNOL,BUNKYO KU,TOKYO 113,JAPAN
[2] OSAKA UNIV,INST MOL & CELLULAR BIOL,SUITA,OSAKA 565,JAPAN
[3] MEIJI MILK PROD CO LTD,MEIJI INST HLTH SCI,ODAWARA,KANAGAWA 250,JAPAN
[4] KANAGAWA ACAD SCI & TECHNOL,BIO SIGNAL PATHWAY PROJECT,ODAWARA,KANAGAWA 250,JAPAN
[5] AMGEN INST,TORONTO,ON M4X 1K9,CANADA