1. Department of Neurology, Mayo Clinic, Rochester, Minnesota2Department of Clinical Neuroscience, University of North Dakota School of Medicine and Health Sciences, Fargo
2. Department of Neurology, Mayo Clinic, Rochester, Minnesota3Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota
3. Department of Neurology, Mayo Clinic, Rochester, Minnesota4Department of Psychiatry and Behavior Sciences, University of Texas Medical School, Houston
4. Division of Biomedical Statistics and Informatics, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota
5. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota
6. Department of Psychiatry and Psychology, Mayo Clinic, Scottsdale, Arizona8Department of Neurology, Mayo Clinic, Scottsdale, Arizona