<Observation xmlns="http://hl7.org/fhir"><id value="f004"/><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"/><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><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>