Author information:
(1)Department of Neurology, Johns Hopkins University School of Medicine, 
Baltimore, MD, USA Division of Pediatric Neurology, Emory University/Children's 
Healthcare of Atlanta, Atlanta, GA, USA dwolf03@emory.edu.
(2)Department of Pediatrics, Eudowood Neonatal Pulmonary Division, Johns Hopkins 
University School of Medicine, Baltimore, MD, USA.
(3)McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University 
School of Medicine, Baltimore, MD, USA.
(4)Division of Pediatric Dermatology, Johns Hopkins University School of 
Medicine, Baltimore, MD, USA.
(5)McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University 
School of Medicine, Baltimore, MD, USA Kennedy Krieger Institute, Baltimore, MD, 
USA Division of Pediatric Endocrinology, Johns Hopkins University School of 
Medicine, Baltimore, MD, USA.
(6)The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 
Baltimore, MD, USA.
(7)Department of Neurology, Johns Hopkins University School of Medicine, 
Baltimore, MD, USA.