1. Mayo Clinic Alix School of Medicine, Phoenix, AZ, USA
2. Department of Medicine, Mayo Clinic, Rochester, MN, USA
3. Department of Emergency Medicine, Mayo Clinic, Rochester, MN, USA
4. Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA
5. Department of Radiation Oncology, Mayo Clinic, Phoenix, AZ, USA
6. Department of Health Sciences Research, Scottsdale, AZ, USA
7. Department of EmergencyMedicine, Mayo Clinic, Phoenix, AZ, USA