CDA STU Update Publication of HL7 CDA® R2 Implementation Guide: Quality Reporting Document Architecture Category I (QRDA I) Release 1, STU Release 5.3 – US Realm December 8, 2021December 8, 2021 Lynn Laakso STU, US Realm Learn more at https://www.hl7.org/implement/standards/product_brief.cfm?product_id=35