[1] HEKTOEN INST MED RES,CONGENITAL HEART DIS RES & TRAINING CTR,CHICAGO,IL
[2] LARABIDA CHILDRENS HOSP & RES CTR,CHICAGO,IL
[3] UNIV CHICAGO,PRITZKER SCH MED,DEPT PATHOL,CHICAGO,IL
[4] UNIV CHICAGO,PRITZKER SCH MED,DEPT PEDIAT,CHICAGO,IL
[5] NORTHWESTERN UNIV,MED SCH,DEPT PATHOL,CHICAGO,IL
[6] UNIV HLTH SCI,CHICAGO SCH MED,CHICAGO,IL
[7] LOYOLA UNIV,STRITCH SCH MED,CHICAGO,IL
[8] UNIV ILLINOIS,ABRAHAM LINCOLN SCH MED,DEPT PATHOL & MED,CHICAGO,IL