[1] Vanderbilt Univ, Med Ctr, Dept Pathol Microbiol & Immunol, Vanderbilt Ctr Immunobiol, Nashville, TN 37232 USA
[2] Vanderbilt Univ, Med Ctr, Vanderbilt Inst Infect Immunol & Inflammat, Nashville, TN 37232 USA
[3] Univ Calif San Francisco, Dept Microbiol & Immunol, Sandler Asthma Basic Res Ctr, San Francisco, CA 94143 USA