From the Department of Pediatrics and Adolescent Medicine (H.R., A.O., P.H., L.S., R.S., J.G., K.B.), Division of Pediatric Neurology, University Medical Center Göttingen, Georg August University; Department of Pediatrics (M.B.), Hospital Dritter Orden, Munich, Germany; Departments of Pediatric Neurology (I.C.), Hospital Maria Pia do Centro Hospitalar do Porto, Portugal; 4IRCCS Stella Maris (S.F.), Calambrone, Pisa; Department of Clinical and Experimental Medicine (S.F.), University of Pisa, Italy;... (At 2014-03-18)