---
type: "example"
title: "ResearchSubject Example: researchsubject-example-crossover-placebo-to-drug"
resource: "ResearchSubject"
example: "researchsubject-example-crossover-placebo-to-drug"
---
# ResearchSubject Example: researchsubject-example-crossover-placebo-to-drug

## Example XML



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

<ResearchSubject xmlns="http://hl7.org/fhir">
	<id value="example-crossover-placebo-to-drug"/>
	<identifier>
		<value value="ecsr45"/>
	</identifier>
	<status value="active"/>
	<progress>
		<type>
			<coding>
				<system value="http://terminology.hl7.org/CodeSystem/research-subject-state-type"/>
				<code value="Enrollment"/>
			</coding>
			<text value="Enrollment status"/>
		</type>
	</progress>
	<progress>
		<type>
			<coding>
				<system value="http://terminology.hl7.org/CodeSystem/research-subject-state-type"/>
				<code value="Enrollment"/>
				<display value="Enrollment status"/>
			</coding>
		</type>
		<subjectState>
			<coding>
				<system value="http://terminology.hl7.org/CodeSystem/research-subject-state"/>
				<code value="on-study"/>
				<display value="On-study"/>
			</coding>
		</subjectState>
		<reason>
			<coding>
				<code value="informedConsentSigned"/>
			</coding>
			<text value="Informed consent signed"/>
		</reason>
		<startDate value="2022-06-10"/>
	</progress>
	<period>
		<start value="2022-06-10"/>
	</period>
	<study>
		<reference value="example-ctgov-study-record"/>
	</study>
	<subject>
		<reference value="cfsb1676546565857"/>
	</subject>
	<comparisonGroup>
		<concept>
			<coding>
				<system value="http://hl7.org/fhir/example-comparison-group"/>
				<code value="placebo"/>
				<display value="Placebo"/>
			</coding>
		</concept>
	</comparisonGroup>
	<comparisonGroup>
		<concept>
			<text value="ap303"/>
		</concept>
	</comparisonGroup>
</ResearchSubject>
```