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2. National estimates and race/ethnic-specific variation of selected birth defects in the United States, 1999–2001;Canfield;Birth Defects Res A Clin Mol Teratol,2006
3. Ophthalmic abnormalities in children with Down syndrome;Creavin;J Pediatr Ophthalmol Strabismus,2009
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5. Atlantoaxial instability in individuals with Down syndrome: epidemiologic, radiographic, and clinical studies;Pueschel;Pediatrics,1987