1 Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.
2 Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Moursund Street, Ste. 1325, Houston, TX, USA.
3 Autism Center, Texas Children's Hospital, Houston, TX, USA.
4 Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.
5 Dan L. Duncan Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, TX, USA.
6 Department of Pediatrics, Vanderbilt University Medical Center, Nashville, USA.
7 Northeast Indiana Genetics, Fort Wayne, IN, USA.
8 Department of Neurology, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, USA.
9 Department of Pediatrics, Division of Genetics and Genomic Medicine, Washington University School of Medicine in St. Louis, St. Louis, MO, USA.
10 Medical Genetics, MassGeneral Hospital for Children, Harvard Medical School, Boston, MA, USA.
11 Medical Genetics, Shodair Children's Hospital, Helena, MT, USA.
12 Department of Pediatrics-Diabetes and Endocrinology, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, USA.
13 Department of Child Health, Division of Genetics and Metabolism, Phoenix Children's Hospital, University of Arizona College of Medicine, Phoenix, AZ, USA.
14 Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA. schaaf@bcm.edu.
15 Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Moursund Street, Ste. 1325, Houston, TX, USA. schaaf@bcm.edu.