[1] UNIV CALIF LOS ANGELES,SCH MED,DEPT MICROBIOL & IMMUNOL,LOS ANGELES,CA 90024
[2] UNIV CALIF LOS ANGELES,SCH MED,DEPT MED,DIV INFECT DIS,LOS ANGELES,CA 90024
[3] UNIV CALIF LOS ANGELES,INST MOLEC BIOL,LOS ANGELES,CA 90024
[4] UNIV TEXAS,SCH MED,DEPT PATHOL & LAB MED,HOUSTON,TX 77025