1. From the Lowance Center for Human Immunology and Rheumatology, Emory University, Atlanta, GA (K.P., J.D., J.J.G., C.M.W.); School of Medicine, Stanford University, Stanford, CA (J.D., J.T.K., M.D., J.J.G., C.M.W.); and Mayo Clinic, Rochester, MN (K.W., B.Y.).