[1] WASHINGTON UNIV, DIV BIOL & BIOMED SCI, DEPT PATHOL, 660 S EUCLID AVE, ST LOUIS, MO 63110 USA
[2] WASHINGTON UNIV, DIV BIOL & BIOMED SCI, DEPT MICROBIOL, 660 S EUCLID AVE, ST LOUIS, MO 63110 USA
[3] WASHINGTON UNIV, DIV BIOL & BIOMED SCI, DEPT BIOL CHEM, 660 S EUCLID AVE, ST LOUIS, MO 63110 USA