1. Department of Microbiology, Immunology, and Molecular Genetics, University of Kentucky College of Medicine, Lexington, Kentucky 40536
2. Department of Medical Microbiology and Immunology, University of Toledo Health Sciences Campus, Toledo, Ohio 43614
3. Statistics Collaborative, Inc., Washington, DC 20036
4. Molecular Genetics and Rheumatology Section, Division of Medicine, Imperial College, Hammersmith Campus, London W12 0NN, United Kingdom
5. Leibniz Institute for Natural Products Research and Infection Biology, Hans Knöll Institute, Beutenbergstrasse 11a, D-07745 Jena, Germany