[1] AMER RED CROSS BLOOD SERV,NE REG,DEDHAM,MA
[2] UNIV OXFORD,JOHN RADCLIFFE HOSP,DEPT PAEDIAT,OXFORD OX3 9DU,ENGLAND
[3] US PHS HOSP,WHITERIVER,AZ
[4] US PHS HOSP,SAN CARLOS,AZ
[5] JOHNS HOPKINS UNIV,SCH MED,DEPT PEDIAT,DIV PEDIAT INFECT DIS,BALTIMORE,MD 21205
[6] FRANCIS SCOTT KEY MED CTR,DEPT MED,BALTIMORE,MD
[7] HARVARD UNIV,SCH MED,DANA FARBER CANC INST,INFECT DIS LAB,BOSTON,MA 02115
[8] MASSACHUSETTS DEPT PUBL HLTH,CTR DIS CONTROL,BIOL LABS,JAMAICA PLAIN,MA