[1] HARVARD UNIV,SCH MED,DANA FARBER CANC INST,BOSTON,MA 02115
[2] HARVARD UNIV,SCH MED,DEPT MICROBIOL & MOLEC GENET,BOSTON,MA 02115
[3] HARVARD UNIV,SCH MED,DEPT BIOL CHEM & MOLEC PHARMACOL,BOSTON,MA 02115
[4] TUFTS UNIV,SCH MED,DEPT PATHOL,BOSTON,MA 02111
[5] TUFTS UNIV,SCH VET MED,BOSTON,MA 02111