Participant Cohorts and Clinical Collaborators: Collaborators: Daniel J. Moore, M.D., Ph.D., Assistant Professor of Pediatrics, Division of Endocrinology Myositis and Scleroderma Treatment Initiative Center Collaborators: Leslie J. Crofford, M.D., Professor of Medicine, Division Director of Rheumatology and Immunology, Professor of Pathology, Microbiology, and Immunology Erin M. Wilfong, M.D., Ph.D., Assistant Professor of Medicine, Division of Rheumatology and Immunology Jennifer Young-Glazer, M.D., Assistant Professor of Medicine, Division of Rheumatology and Immunology B Lymphocytes in Sjogren's Syndrome Collaborators: Narender Annapureddy, M.D., Assistant Professor of Medicine, Division of Rheumatology and Immunology Erin M. Wilfong, M.D., Ph.D., Assistant Professor of Medicine, Division of Rheumatology and Immunology B Lymphocytes in Vasculitis Collaborators: Jason Springer, M.D., Assistant Professor of Medicine, Division of Rheumatology and Immunology Kevin Byram, M.D., Assistant Professor of Medicine, Division of Rheumatology and Immunology Immune Checkpoint Inhibitor-Induced Autoimmune Sicca Collaborators: Doug Johnson, M.D., M.S.C.I., Associate Professor of Medicine, Division of Hematology and Oncology