[1] HARVARD UNIV,SCH MED,BOSTON,MA 02115
[2] NORTHWESTERN UNIV,EVANSTON HOSP,SCH MED,DEPT NEUROL,DIV ALLERGY IMMUNOL,CHICAGO,IL 60611
[3] FROEDTERT MEM LUTHERAN HOSP,MED COLL WISCONSIN,DEPT NEUROL,MILWAUKEE,WI
[4] UNIV UTAH,SCH MED,DEPT NEUROL,SALT LAKE CITY,UT 84112
[5] UNIV MINNESOTA HOSP & CLIN,DEPT NEUROL,MINNEAPOLIS,MN 55455
[6] UNIV KENTUCKY,DEPT NEUROL,LEXINGTON,KY 40506
[7] CHILDRENS HOSP MED CTR,BLOOD BANK,BOSTON,MA 02115
[8] HARVARD UNIV,SCH PUBL HLTH,DEPT BIOSTAT,BOSTON,MA 02115