1. From The Department of Sociology, Anthropology, & Public Health, University of Maryland Baltimore County (UMBC), Baltimore, MD, USA (EGR)
2. Gryphon Scientific, Takoma Park, MD, USA (SLM)
3. Department of Veterans Affairs Multiple Sclerosis Center of Excellence, Washington, DC, USA (HWM, MTW)
4. Capitol Heights, MD, USA (ZJM)
5. George Washington University School of Medicine, Washington, DC, USA (MTW)