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[2] CHILDRENS HOSP,LOS ANGELES,CA
[3] UNIV SO CALIF,SCH MED,DEPT MED,LOS ANGELES,CA
[4] GEORGE WASHINGTON UNIV,SCH MED,DEPT CHILD HLTH & DEV,WASHINGTON,DC
[5] UNIV SO CALIF,SCH MED,DEPT PEDIAT,LOS ANGELES,CA
[6] UNIV WISCONSIN,COLL AGR & LIFE SCI,DEPT BIOCHEM,MADISON,WI