1. Division of Infectious Diseases, Mayo Clinic, Rochester, Minnesota, USA
2. Divison of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, Minnesota, USA
3. Division of General Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
4. Division of Infectious Diseases, Mayo Clinic, Jacksonville, Florida, USA
5. Division of Infectious Diseases, Mayo Clinic, Scottsdale, Arizona, USA