[1] HARVARD UNIV,SCH MED,DANA FARBER CANC INST,DEPT PATHOL,DIV HUMAN RETROVIROL,BOSTON,MA 02115
[2] CHILDRENS HOSP,INA SUE PERLMUTTER LAB,BOSTON,MA 02115
[3] BETH ISRAEL HOSP,DEPT MED,BOSTON,MA 02215
[4] BETH ISRAEL HOSP,DEPT PEDIAT,BOSTON,MA 02215
[5] HARVARD UNIV,SCH PUBL HLTH,DEPT CANC BIOL,BOSTON,MA 02115
[6] LEUKOSITE INC,CAMBRIDGE,MA 02142
[7] UNIV PADUA,SCH MED,INST MICROBIOL,I-35121 PADUA,ITALY