1. Department of Pediatrics, Uniformed Services University of the Health Sciences , Bethesda, MD 20814, USA
2. Henry M. Jackson Foundation for the Advancement of Military Medicine , Bethesda, Maryland 20817, USA
3. Retired , Kensington, MD 20895, USA
4. Departments of Physical Medicine & Rehabilitation, Uniformed Services University of the Health Sciences, Center for Rehabilitation Sciences Research , Bethesda, MD 20814, USA
5. Department of Psychiatry, Uniformed Services University of the Health Sciences , Bethesda, MD 20814, USA
6. Department of Psychiatry, Yale School of Medicine , New Haven, CT 06511, USA