1. Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado 80523-1682, United States
2. Department of Chemistry and Biochemistry, University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
3. Department of Microbiology, University of Alabama at Birmingham, 845 19th Street South, Birmingham, Alabama 35294, United States