1. Section of Pediatric Neurology and Developmental Neuroscience, Department of Pediatrics Baylor College of Medicine Houston Texas USA
2. Blue Bird Circle Rett Center Texas Children's Hospital Houston Texas USA
3. Institute of General Practice and Health Services Research, School of Medicine Technical University of Munich Munich Germany
4. The Meyer Center for Developmental Pediatrics Houston Texas USA
5. IONIS Pharmaceuticals Carlsbad California USA
6. Bioinformatics Core, Jan and Dan Duncan Neurological Research Institute Texas Children's Hospital Houston Texas USA