1. Vanderbilt University School of Medicine, Nashville, Tennessee
2. Unit of Medicine and Clinical Immunology, Università Vita-Salute San Raffaele, San Raffaele Scientific Institute, Milan, Italy
3. Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston
4. Vanderbilt University School of Medicine, Nashville, Tennessee4Department of Neurology, Vanderbilt University School of Medicine, Nashville, Tennessee