UMLS (HL7) C1550429 Relation/PAR: HL7 Vocabulary Version 2.5
Relation/CHD: Any date/time within a range
Collection date/time, equivalent to film or sample collection date/time
Order date/time
Specimen receipt date/time, receipt of specimen in filling ancillary (Lab)
Report date/time, report date/time at filing ancillary (i.e., Lab)
Schedule date/time