1. Swiss National Center for Mycobacteria, Department of Medical Microbiology, University of Zurich, Zurich, Switzerland1;
2. Veterans Affairs Medical Center, West Haven, Connecticut2;
3. New York City Department of Health, New York,3 and
4. Wadsworth Center, New York State Department of Health, Albany,4 New York;
5. Laboratory Center for Disease Control, Ottawa, Canada5;
6. Mayo Clinic, Rochester, Minnesota6; and
7. Becton Dickinson Microbiology Systems, Sparks, Maryland7