1. Department of Pathology, University of Texas Medical Branch, Galveston, Texas 77555-07401;
2. Microbiology Service, Clinical Pathology Department, W. G. Magnuson Clinical Center, National Institutes of Health, Bethesda, Maryland 208922;
3. Department of Pathology, University of Texas—Houston Medical School, Houston, Texas 770303;
4. StatProbe, Ann Arbor, Michigan 481084; and
5. Department of Microbiology, University of Texas Health Center at Tyler, Tyler, Texas 757105