1. Department of Neurology Mayo Clinic Rochester MN USA
2. Robert D. and Patricia E. Kern Center for the Science of Health Care Delivery Mayo Clinic Rochester MN USA
3. Department of Biomedical Statistics and Informatics Mayo Clinic Rochester MN USA
4. Mayo Clinic Survey Research Center Mayo Clinic Rochester MN USA
5. Division of Primary Care Internal Medicine, Department of Medicine Mayo Clinic Rochester MN USA