[1] UNIV PENN,SCH MED,DEPT PHARMACOL,PHILADELPHIA,PA 19104
[2] UNIV PENN,SCH MED,DEPT RADIOL,PHILADELPHIA,PA 19104
[3] UNIV PENN,SCH MED,DEPT MED,PHILADELPHIA,PA 19104
[4] PHILADELPHIA GEN HOSP,MED SERV,PHILADELPHIA,PA 19104
[5] UNIV PENN,SCH MED,DEPT NEUROL,PHILADELPHIA,PA 19104
[6] PHILADELPHIA GEN HOSP,STROKE RES CTR,PHILADELPHIA,PA 19104
[7] PHILADELPHIA GEN HOSP,NEUROL SERV,PHILADELPHIA,PA 19104