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Down syndrome - Symptoms and causes - Mayo Clinic
What are the symptoms of Down syndrome? - NICHD
Down Syndrome: Symptoms & Causes - Cleveland Clinic
8 Ways to Recognize Down Syndrome: Symptoms, Warning …
Symptoms and Characteristics of Down Syndrome - Verywell …
Down Syndrome: Causes, Symptoms, Diagnosis, and Treatment - WebMD
Down Syndrome | Birth Defects | CDC - Centers for Disease …
Down Syndrome - NICHD - Eunice Kennedy Shriver National …
Down Syndrome - Symptoms and Causes - Penn Medicine
Down Syndrome: Causes, Types, and Symptoms - Healthline
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