[1] MEM SLOAN KETTERING CANC CTR,ANALGES STUDIES SECT,NEW YORK,NY 10021
[2] MEM SLOAN KETTERING CANC CTR,DEPT NEUROL,NEW YORK,NY 10021
[3] CORNELL UNIV,MED CTR,COLL MED,DEPT PHARMACOL,NEW YORK,NY 10021
[4] CORNELL UNIV,MED CTR,COLL MED,DEPT MED,NEW YORK,NY 10021
[5] CORNELL UNIV,MED CTR,COLL MED,DEPT NEUROL,NEW YORK,NY 10021