<status value="draft" /> <publisher value="NMDP" /> <contact> <name value="David Wroe" /> <telecom> <system value="email" /> <value value="fhir@nmdp.org" /> <use value="work" /> </telecom> </contact> <description value="# HLA Immunoassay Working Sample Extension of US Core Specimen ## Working Sample A sample (likely blood) drawn from a patient. ### Elements * **working-sample-id**: Unique identifier for this sample * **sample-datetime**: Date and time when the sample was drawn * **testing-laboratory**: Identifier for the lab ## Working Sample (Preparation) A processed portion of the sample prepared for panel analysis. ### Elements * **treatment**: Process performed during preparation * **method**: Ex. dilution * **diluent**: Description of the diluent substance/buffer * **ratio**: Dilution ratio (usually between 0 and 1)" /> <fhirVersion value="4.0.1" /> <kind value="resource" /> <abstract value="false" /> <type value="Specimen" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Specimen" /> <derivation value="constraint" /> <differential> <element id="Specimen.identifier"> <path value="Specimen.identifier" /> <min value="1" /> <max value="1" /> <mustSupport value="true" /> </element> <element id="Specimen.type"> <path value="Specimen.type" /> <mustSupport value="true" /> </element> <element id="Specimen.subject"> <path value="Specimen.subject" /> <min value="1" /> <mustSupport value="true" /> </element> <element id="Specimen.collection"> <path value="Specimen.collection" /> <mustSupport value="true" /> </element> <element id="Specimen.collection.collected[x]"> <path value="Specimen.collection.collected[x]" /> <min value="1" /> <mustSupport value="true" /> </element> <element id="Specimen.processing"> <path value="Specimen.processing" /> <max value="1" /> <mustSupport value="true" /> </element> <element id="Specimen.processing.description"> <path value="Specimen.processing.description" /> <mustSupport value="true" /> </element> <element id="Specimen.processing.method"> <path value="Specimen.processing.method" /> <min value="1" /> <mustSupport value="true" /> </element> <element id="Specimen.processing.additive"> <path value="Specimen.processing.additive" /> <mustSupport value="true" /> </element> </differential> </StructureDefinition>