[1] ABBOTT LABS, DEPT NEUROL & UROL DIS RES, ABBOTT PK, IL 60064 USA
[2] SCHERING PLOUGH CORP, RES INST, CNS CARDIOVASC DEPT, KENILWORTH, NJ 07033 USA
[3] LOS ALAMOS NATL LAB, CHEM SCI & TECHNOL DIV, BIOSCI & BIOTECHNOL GRP, LOS ALAMOS, NM 87545 USA
[4] UNIV TOKYO, DEPT NEUROBIOCHEM, TOKYO 113, JAPAN