1. Mayo Clinic School of Graduate Medical Education, Rochester, MN, USA
2. Department of Cardiovascular Diseases, Mayo Clinic, Phoenix, AZ, USA
3. Department of Biomedical Statistics and Informatics, Division of Health Sciences Research, Mayo Clinic, Scottsdale, AZ, USA
4. Department of Cardiovascular Diseases, Mayo Clinic, Jacksonville, FL, USA
5. Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA