<Observation xmlns="http://hl7.org/fhir">
    <!--  code element will always be as shown  -->
    <status value="final" />
    <code>
        <coding>
            <system value="http://snomed.info/sct" />
            <code value="102519007" />
            <display value="Apparent age" />
        </coding>
    </code>
    <!--  MUST be linked to a subject  -->
    <subject>
        <reference value="urn:uuid:b6256eda-a021-11ea-bb37-0242ac130002" />
    </subject>
    <!--   ## Patient approximate age EPR (ADS56) ##   -->
    <valueQuantity>
        <value value="38" />
        <unit value="Year" />
        <system value="http://unitsofmeasure.org" />
        <code value="a" />
    </valueQuantity>
</Observation>