{description: candidate | in-prescreening | in-screening | eligible | ineligible | on-study | on-study-intervention | in-follow-up | off-study, package_name: hl7.fhir.r6.core, name: subject_state, type: token, package_version: 6.0.0-ballot2, class: unknown, kind: null, url: 'http://hl7.org/fhir/SearchParameter/ResearchSubject-subjectstate', version: 6.0.0-ballot2}