1. From the Departments of Pediatrics (V.S.T., R.I.S., C.C.), Medicine (S.P.M.), and Neurosurgery (S.A.S., M.E.S.,E.S.C.), Columbia University College of Physicians and Surgeons, New York, NY; Rheumatology Section (M.B.), Faculty of Medicine, Imperial College, London, UK; and Department of Medicine (D.J.P.), University of Michigan, Ann Arbor, MI.