[1] MASSACHUSETTS GEN HOSP,DEPT MED,INFECT DIS UNIT,BOSTON,MA 02114
[2] HARVARD UNIV,SCH MED,DEPT MED,BOSTON,MA 02115
[3] HARVARD UNIV,SCH MED,DEPT MICROBIOL & MOLEC GENET,BOSTON,MA 02115
[4] MASSACHUSETTS GEN HOSP,COMP SCI LAB,BOSTON,MA 02114
[5] MASSACHUSETTS GEN HOSP,FRANCIS BLAKE BACTERIOL LABS,BOSTON,MA 02114