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