1. Southern California Evidence-based Practice Center, RAND Corporation, Santa Monica, CA, USA
2. Specialty Care Services, U.S. Department of Veterans Affairs, Washington, DC, USA/Department of Neurology, School of Medicine, University of California, San Francisco, San Francisco, CA, USA
3. Evidence-based Synthesis Program (ESP) Center, West Los Angeles VA Medical Center, Los Angeles, CA, USA
4. Southern California Evidence-based Practice Center, RAND Corporation, Santa Monica, CA USA/Evidence-based Synthesis Program (ESP) Center, West Los Angeles VA Medical Center, Los Angeles, CA, USA
5. Multiple Sclerosis Centers of Excellence-East, U.S. Department of Veterans Affairs, Washington, DC, USA/Department of Neurology, School of Medicine, Georgetown University, Washington, DC, USA