| ResearchStudy | | 0..* |
| ResearchStudy.id | id | 0..1 |
| ResearchStudy.meta | Meta | 0..1 |
| ResearchStudy.implicitRules | uri | 0..1 |
| ResearchStudy.language | code | 0..1 |
| ResearchStudy.text | Narrative | 0..1 |
| ResearchStudy.contained | Resource | 0..* |
| ResearchStudy.extension | Extension | 0..* |
| ResearchStudy.modifierExtension | Extension | 0..* |
| ResearchStudy.identifier | Identifier | 1..1 |
| ResearchStudy.identifier.id | string | 0..1 |
| ResearchStudy.identifier.extension | Extension | 0..* |
| ResearchStudy.identifier.use | code | 0..1 |
| ResearchStudy.identifier.type | CodeableConcept | 0..1 |
| ResearchStudy.identifier.system | uri | 0..1 |
| ResearchStudy.identifier.value | string | 0..1 |
| ResearchStudy.identifier.period | Period | 0..1 |
| ResearchStudy.identifier.assigner | Reference(Organization) | 0..1 |
| ResearchStudy.title | string | 0..1 |
| ResearchStudy.protocol | Reference(PlanDefinition) | 0..0 |
| ResearchStudy.partOf | Reference(ResearchStudy) | 0..0 |
| ResearchStudy.status | code | 1..1 |
| ResearchStudy.category | CodeableConcept | 0..0 |
| ResearchStudy.focus | CodeableConcept | 0..0 |
| ResearchStudy.contact | ContactDetail | 0..0 |
| ResearchStudy.relatedArtifact | RelatedArtifact | 0..0 |
| ResearchStudy.keyword | CodeableConcept | 0..0 |
| ResearchStudy.jurisdiction | CodeableConcept | 0..0 |
| ResearchStudy.description | markdown | 0..1 |
| ResearchStudy.enrollment | Reference(Group) | 0..0 |
| ResearchStudy.period | Period | 0..1 |
| ResearchStudy.sponsor | Reference(Organization) | 0..1 |
| ResearchStudy.sponsor.id | string | 0..1 |
| ResearchStudy.sponsor.extension | Extension | 0..* |
| ResearchStudy.sponsor.reference | string | 0..0 |
| ResearchStudy.sponsor.identifier | Identifier | 0..0 |
| ResearchStudy.sponsor.display | string | 0..1 |
| ResearchStudy.principalInvestigator | Reference(Practitioner) | 0..0 |
| ResearchStudy.site | Reference(Location) | 0..0 |
| ResearchStudy.reasonStopped | CodeableConcept | 0..0 |
| ResearchStudy.note | Annotation | 0..* |
| ResearchStudy.arm | BackboneElement | 0..0 |
| ResearchStudy.arm.id | string | 0..1 |
| ResearchStudy.arm.extension | Extension | 0..* |
| ResearchStudy.arm.modifierExtension | Extension | 0..* |
| ResearchStudy.arm.name | string | 1..1 |
| ResearchStudy.arm.code | CodeableConcept | 0..1 |
| ResearchStudy.arm.description | string | 0..1 |
