[1] NIAID, DEPT CLIN PATHOL, MICROBIOL SERV, BETHESDA, MD 20205 USA
[2] NIAID, CTR CLIN, DEPT CRIT CARE MED, BETHESDA, MD 20205 USA
[3] NIAID, IMMUNOREGULAT LAB, BETHESDA, MD 20205 USA
[4] MAYO CLIN & MAYO FDN, MICROBIOL SECT, ROCHESTER, MN 55901 USA
[5] FAIRFAX HOSP, DEPT PATHOL, FALLS CHURCH, VA 22046 USA