[1] PETER BENT BRIGHAM HOSP,DEPT MED,CHANNING LAB,BOSTON,MA 02115
[2] HARVARD UNIV,SCH MED,DEPT MED,CAMBRIDGE,MA 02138
[3] HARVARD UNIV,SCH PUBL HLTH,DEPT MICROBIOL,CAMBRIDGE,MA 02138
[4] BOSTON CITY HOSP,DEPT MED,BOSTON,MA 02118
[5] BOSTON CITY HOSP,DEPT MED MICROBIOL,BOSTON,MA 02118
[6] ROGER WILLIAMS GEN HOSP,DEPT MED,DIV INFECT DIS,PROVIDENCE,RI 02908
[7] BROWN UNIV,DIV BIOL & MED SCI,PROVIDENCE,RI 02912