1. Department of Rehabilitation Medicine, Brooke Army Medical Center, JBSA Fort Sam Houston, TX 78234, USA
2. Department of Rehabilitation Medicine, Uniformed Services University of Health Science, Bethesda, MD 20814, USA
3. Associate Chief of Staff, Education, Veterans Affairs Puget Sound Health Care System, Tacoma, WA 98498, USA
4. Office of the Surgeon General, U.S. Army Medical Command, Falls Church, VA 22042, USA