1. Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
2. Department of Neurology, Mayo Clinic, Rochester, MN, USA
3. Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN, USA
4. Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN, USA
5. Department of Psychiatry and Psychology, Mayo Clinic, Rochester, MN, USA