1. From the Hospital for Special Surgery, Weill Cornell Medical College, New York (R.F.S.), and Regeneron Pharmaceuticals, Tarrytown (A.G., M.C.N., B.A., R.B., G.D.Y.) — both in New York; the Vasculitis and Glomerulonephritis Center, Massachusetts General Hospital, Harvard Medical School, Boston (S.U.), and Sanofi, Cambridge (J.S., N.P.) — both in Massachusetts; the Division of Rheumatology, Mayo Clinic College of Medicine, Rochester, MN (K.J.W.); Sanofi, Bridgewater, NJ (W.W., Y.L.); the Department of...