1. Division of Public Health, Infectious Diseases, and Occupational Medicine, Mayo Clinic , Rochester, Minnesota , USA
2. Department of Medicine, Mayo Clinic , Rochester, Minnesota , USA
3. Division of Clinical Microbiology, Mayo Clinic , Rochester, Minnesota , USA
4. Division of Infectious Diseases, Mayo Clinic , Jacksonville, Florida , USA
5. Division of Infectious Diseases, Mayo Clinic , Phoenix, Arizona , USA