1. Division of Public Health, Infectious Diseases and Occupational Medicine, Department of Medicine, Mayo Clinic College of Medicine and Science, Mayo Clinic, Rochester, MN 55905, USA
2. Division of Clinical Trials and Biostatistics, Mayo Clinic College of Medicine and Science, Mayo Clinic, Rochester, MN 55905, USA
3. Clinical Microbiology Core Laboratory, Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine and Science, Mayo Clinic, Rochester, MN 55905, USA
4. Division of Pulmonary and Critical Care, Department of Medicine, Mayo Clinic College of Medicine and Science, Mayo Clinic, Rochester, MN 55905, USA
5. Department of Cardiovascular Medicine, Mayo Clinic College of Medicine and Science, Mayo Clinic, Rochester, MN 55905, USA
6. Institute for Infectious Diseases, University of Bern, 3001 Bern, Switzerland