1. Department of Dermatology Perelman School of Medicine at the University of Pennsylvania Philadelphia PA U.S.A
2. Corporal Michael J. Crescenz Veterans Affairs Medical Center (Philadelphia) Philadelphia PA U.S.A
3. Center for Clinical Epidemiology and Biostatistics University of Pennsylvania Philadelphia PA U.S.A
4. Department of Neurology Perelman School of Medicine at the University of Pennsylvania Philadelphia PA U.S.A
5. Division of Rheumatology Perelman School of Medicine at the University of Pennsylvania Philadelphia PA U.S.A
6. Department of Neurology GlaxoSmithKline USA Philadelphia PAU.S.A
7. Department of Neurology Temple University School of Medicine Philadelphia PAU.S.A