<BiologicallyDerivedProduct xmlns="http://hl7.org/fhir"><id value="allogeneicHCT"/><request><reference value="ServiceRequest/example"/><display value="Service Request for HCT Collection"/></request><collection><sourcePatient><reference value="Patient/pat2"/><display value="HCT Donor"/></sourcePatient></collection></BiologicallyDerivedProduct>