[1] UNIV MINNESOTA HOSP & CLIN,DEPT NEUROL,BOX 295 MAYO,MINNEAPOLIS,MN 55455
[2] UNIV MINNESOTA HOSP & CLIN,DEPT LAB MED & PATHOL,MINNEAPOLIS,MN 55455
[3] UNIV MINNESOTA HOSP & CLIN,DEPT NEUROL & PSYCHIAT,MINNEAPOLIS,MN 55455
[4] ST PAUL RAMSEY MED CTR,PSYCHIAT RES LABS,ST PAUL,MN 55101