1. Departments of Medicine and Pathology, Vanderbilt University School of Medicine, Nashville, Tennessee 372321;
2. Department of Medical Microbiology, University of Zurich, Zurich, CH-8028 Switzerland2;
3. MIDI Labs, Inc., Newark, Delaware 197133;
4. Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 559054;
5. Perkin-Elmer Biosystems, Foster City, California 944045; and
6. Corixa Corporation and the Infectious Disease Research Institute, Seattle, Washington 981046