Patient Allergy Information (AL1) segment — HL7v2 v2.5.1.
Records allergy information for a patient. 6 fields per HL7 v2.5.1 specification.
@type t() :: %HL7v2.Segment.AL1{ allergen_code: term(), allergen_type_code: term(), allergy_reaction_code: term(), allergy_severity_code: term(), extra_fields: term(), identification_date: term(), set_id: term() }