Affiliation: | 1. Genetic Services at Elwyn, Elwyn, PA, USA 2. National Fragile X Foundation, Walnut Creek, CA, USA 3. Integrated Genetics, Phoenix, AZ, USA 4. Murdoch Childrens Research Institute & Victorian Clinical Genetics Services, Melbourne, Victoria, Australia 5. Division of Medical Genetics, University of Washington Medical Center, Seattle, WA, USA 6. Division of Medical Genetics, Duke University Medical Center, Durham, NC, USA
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