@type t() :: %HL7v2.Segment.OBR{
  assistant_result_interpreter: term(),
  charge_to_practice: term(),
  collection_volume: term(),
  collector_identifier: term(),
  collectors_comment: term(),
  danger_code: term(),
  diagnostic_serv_sect_id: term(),
  escort_required: term(),
  extra_fields: term(),
  filler_field_1: term(),
  filler_field_2: term(),
  filler_order_number: term(),
  filler_supplemental_service_information: term(),
  medically_necessary_duplicate_procedure_reason: term(),
  number_of_sample_containers: term(),
  observation_date_time: term(),
  observation_end_date_time: term(),
  order_callback_phone_number: term(),
  ordering_provider: term(),
  parent: term(),
  parent_result: term(),
  parent_universal_service_identifier: term(),
  placer_field_1: term(),
  placer_field_2: term(),
  placer_order_number: term(),
  placer_supplemental_service_information: term(),
  planned_patient_transport_comment: term(),
  principal_result_interpreter: term(),
  priority: term(),
  procedure_code: term(),
  procedure_code_modifier: term(),
  quantity_timing: term(),
  reason_for_study: term(),
  relevant_clinical_information: term(),
  requested_date_time: term(),
  result_copies_to: term(),
  result_handling: term(),
  result_status: term(),
  results_rpt_status_chng_date_time: term(),
  scheduled_date_time: term(),
  set_id: term(),
  specimen_action_code: term(),
  specimen_received_date_time: term(),
  specimen_source: term(),
  technician: term(),
  transcriptionist: term(),
  transport_arranged: term(),
  transport_arrangement_responsibility: term(),
  transport_logistics_of_collected_sample: term(),
  transportation_mode: term(),
  universal_service_identifier: term()
}