1 Department of Physical Medicine and Rehabilitation, The Rehabilitation Institute of Chicago, Northwestern University Feinberg School of Medicine, 345 E Superior St, Chicago, IL 60651(∗). Electronic address: mhuang@ric.org.
2 Department of Physical Medicine and Rehabilitation, University of Colorado, Denver, CO(†).
3 Director, Advocacy & Government Affairs, American Academy of Physical Medicine & Rehabilitation, Washington, DC(‡).