<Observation xmlns="http://hl7.org/fhir">
  <status value="final" />
  <code>
    <coding>
      <system value="https://kotidigi.fi/fhir/codesystem/SleepAndActivityNotification" />
      <code value="weak-circadian-rhythm" />
      <display value="Weak Circadian Rhythm" />
    </coding>
    <text value="Weak Circadian Rhythm" />
  </code>
  <subject>
    <identifier>
      <system value="https://{environment}.kotidigi.fi/identifier/person" />
      <value value="123e4567-e89b-12d3-a456-426614174000" />
    </identifier>
  </subject>
  <effectiveDateTime value="2023-05-10T10:30:00Z" />
  <valueString value="The user's recent circadian rhythm shows a declining trend." />
  <device>
    <extension url="DeviceVersion">
      <valueString value="Vivago" />
    </extension>
  </device>
</Observation>