1. Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
2. Division of Rheumatology, Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
3. Department of Neurology, Brigham and Women’s Hospital, Boston, Massachusetts
4. Department of Biomedical Informatics, Harvard Medical School, Boston, Massachusetts
5. Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania
6. Department of Biomedical Informatics, University of Pittsburgh, Pittsburgh, Pennsylvania