1. Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, USA
2. Center for Social Epidemiology and Population Health, University of Michigan School of Public Health, Ann Arbor, MI, USA
3. Department of Physical Medicine & Rehabilitation, University of Michigan Medical School, Ann Arbor, MI, USA
4. Department of Health Behavior and Health Education, School of Public Health, University of Michigan, Ann Arbor, MI, USA
5. University of Michigan Institute for Social Research, Ann Arbor, MI, USA
6. Department of Life Sciences, Texas A&M University-Corpus Christi, Corpus Christi, TX, USA
7. Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, USA
8. Veterans Affairs Ann Arbor Center for Clinical Management Research, Ann Arbor, MI, USA