الفهرس 
Down SyndromeOnly 14 pages are availabe for public view
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Abstract
The present study was conducted on 20 down syndrome childran and 20 healthy children as contral group nearly of the same age and sex with exclusion of those with other chromosomal,endocrinal or metabolic diseases and chronic infection,their ages ranged from 4.5 months to 3 year who were presented to the pediatric outpatient clinic,childrens,tanta university.