Real-world patient - erythrocyte (id = "f004")

<?xml version="1.0" encoding="UTF-8"?>

<Observation xmlns="http://hl7.org/fhir">
  <id value="f004"/> 
  <!--     urn:oid:2.16.840.1.113883.4.642.1.7     -->
  <identifier> 
    <use value="official"/> 
    <system value="http://www.bmc.nl/zorgportal/identifiers/observations"/> 
    <value value="6326"/> 
  </identifier> 
  <status value="final"/> 
  <code> 
    <coding> 
      <system value="http://loinc.org"/> 
      <code value="789-8"/> 
      <display value="Erythrocytes [#/volume] in Blood by Automated count"/> 
    </coding> 
  </code> 
  <subject> 
    <reference value="Patient/f001"/> 
    <display value="P. van de Heuvel"/> 
  </subject> 
  <effectiveDateTime value="2013-04-02T10:30:10+01:00"/> 
  <issued value="2013-04-03T15:30:10+01:00"/> 
  <performer> 
    <reference value="Practitioner/f005"/> 
    <display value="A. Langeveld"/> 
  </performer> 
  <valueQuantity> 
    <value value="4.12"/> 
    <!--    Actually, 4.12E+12    -->
    <unit value="10^12/L"/> 
    <system value="http://unitsofmeasure.org"/> 
    <code value="10*12/L"/> 
  </valueQuantity> 
  <interpretation> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation"/> 
      <code value="L"/> 
      <display value="Low"/> 
    </coding> 
  </interpretation> 
  <!--   this example demonstrates using the reference range text element for stuff that
   is not easily structured !  -->
  <referenceRange> 
    <text value="12-14 y Male: 4.4 - 5.2  x  10^12/L ; 12-14 y Female: 4.2 - 4.8  x  10^12/L ; 15-17
     y Male: 4.6 - 5.4  x  10^12/L ; 15-17 y Female: 4.2 - 4.8  x  10^12/L ; 18-64 y
     Male: 4.6 - 5.4  x  10^12/L ; 18-64 y Female: 4.0 - 4.8  x  10^12/L ; 65-74 y Male:
     4.3 - 5.3  x  10^12/L ; 65-74 y Female: 4.1 - 4.9  x  10^12/L"/> 
  </referenceRange> 
</Observation>