[1] OHIO STATE UNIV, PROGRAM MOLEC CELLULAR & DEV BIOL, COLUMBUS, OH 43210 USA
[2] OHIO STATE UNIV, DEPT MED MICROBIOL & IMMUNOL, COLUMBUS, OH 43210 USA
[3] OHIO STATE UNIV, CTR COMPREHENS CANC, COLUMBUS, OH 43210 USA
[4] HARVARD UNIV, BETH ISRAEL HOSP, SCH MED, DIV INFECT DIS, BOSTON, MA 02215 USA
[5] HARVARD UNIV, SCH MED, DANA FARBER CANC INST, TUMOR VIRUS GENET LAB, BOSTON, MA 02115 USA
[6] UNIV CONNECTICUT, CTR HLTH, DIV INFECT DIS, FARMINGTON, CT 06032 USA