Linda S de Vries1, David Bearden2. 1. From the Department of Neonatology (L.S.d.V.), Wilhelmina Children's Hospital, University Medical Center Utrecht, the Netherlands; and the Division of Neurology (D.B.), Children's Hospital of Philadelphia, PA. l.s.devries@umcutrecht.nl. 2. From the Department of Neonatology (L.S.d.V.), Wilhelmina Children's Hospital, University Medical Center Utrecht, the Netherlands; and the Division of Neurology (D.B.), Children's Hospital of Philadelphia, PA.