[1] NAGASAKI UNIV,SCH MED,DEPT PHARMACOL,NAGASAKI 852,JAPAN
[2] NAGASAKI UNIV,SCH MED,DEPT PATHOL 2,NAGASAKI 852,JAPAN
[3] NAGASAKI UNIV,SCH MED,DEPT NEUROSURG,NAGASAKI 852,JAPAN
[4] KYOTO UNIV,SCH MED,DEPT MED,DIV 2,KYOTO 606,JAPAN
[5] MIYAZAKI MED COLL,DEPT BIOCHEM,MIYAZAKI 88916,JAPAN