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*'''Ultrasonography of hip dysplasia''' is generally the investigation of choice at up to 4 months due to limited ossification of the skeleton.<ref name=acr/><ref group="notes" name=surveillance/>
*'''[[X-ray of hip dysplasia]]''' is generally the initial imaging of choice thereafter.<ref name=acr/><ref group="notes" name=surveillance/></ref><noinclude>
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