1. Division of Infectious Diseases, Department of Medicine Mayo Clinic School of Medicine and Science Rochester Minnesota USA
2. Department of Cardiovascular Disease Mayo Clinic School of Medicine and Science Rochester Minnesota USA
3. Department of Biomedical Statistics and Informatics Mayo Clinic School of Medicine and Science Rochester Minnesota USA
4. Department of Medicine, Division of Infectious Diseases and International Medicine University of Minnesota Medical Center Minnesota USA
5. Section of Infectious Diseases, Department of Medicine Baylor College of Medicine Houston Texas USA