[1] Univ Colorado, Div Infect Dis, Dept Med, Anschutz Med Campus, Aurora, CO 80045 USA
[2] Univ Colorado, Dept Immunol & Microbiol, Anschutz Med Campus, Aurora, CO 80045 USA
[3] Univ Colorado, Dept Med, Div Pulm Sci & Crit Care Med, Anschutz Med Campus, Aurora, CO 80045 USA
[4] NIAID, Rocky Mt Labs, NIH, Hamilton, MT 59840 USA