Clinical Study Phase Master (CM1) segment — HL7v2 v2.5.1.
Contains phase-level information for a clinical study.
3 fields per HL7 v2.5.1 specification.
@type t() :: %HL7v2.Segment.CM1{ description_of_study_phase: term(), extra_fields: term(), set_id: term(), study_phase_identifier: term() }