CDA STU Publication of HL7 CDA® R2 Implementation Guide: Quality Reporting Document Architecture (QRDA I), Release 1, STU Release 5.2 – US Realm February 25, 2020February 25, 2020 Lynn Laakso QRDA, STU, US Realm See more at https://www.hl7.org/implement/standards/product_brief.cfm?product_id=35