1. From the Department of Neurology (R.C.M.T., C.F., C.W., A.T.-G., W.R., P.A.D., B.C.J.), Erasmus MC, University Medical Center Rotterdam; Department of Immunology (R.C.M.T., D.M.C.V.-J., A.T.-G., W.R., R.H., B.C.J.), Erasmus MC, University Medical Center Rotterdam; Department of Neurology (C.F.), Gelre Hospital, Apeldoorn; Department of Neurology (C.W.), IJsselland Hospital, Capelle aan den IJssel; and Department of Hematology (D.M.C.V.-J.), Erasmus MC, University Medical Center Rotterdam, The...