1. Division of Public Health, Infectious Diseases and Occupational Medicine, Mayo Clinic , Rochester, Minnesota , USA
2. Division of Hematopathology, Department of Laboratory Medicine and Pathology, Mayo Clinic , Rochester, Minnesota , USA
3. Department of Cardiovascular Surgery, Mayo Clinic , Rochester, Minnesota , USA
4. Department of Cardiovascular Diseases, Mayo Clinic , Rochester, Minnesota , USA
5. Department of Laboratory Medicine and Pathology, Mayo Clinic , Rochester, Minnesota , USA