[1] UNIV WASHINGTON,HLTH SCI CTR K451,DEPT MICROBIOL,SEATTLE,WA 98195
[2] UNIV WASHINGTON,DEPT MED,SEATTLE,WA 98195
[3] HARVARD UNIV,SCH PUBL HLTH,DEPT CANC BIOL,BOSTON,MA 02115
[4] COLORADO STATE UNIV,DEPT PATHOL,FT COLLINS,CO 80523
[5] ROCKEFELLER UNIV,AARON DIAMOND AIDS RES CTR,NEW YORK,NY 10021
[6] UNIV PISA,DEPT BIOMED,PISA,ITALY