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==Production and license==
In the 1990s the Read codes were released on a quarterly basis for clinical terms, and monthly for drugs and appliances.<ref>{{cite journal|last1=Robinson |first1=David |last2=Schulz |first2=Erich |last3=Brown |first3=Philip |last4=Price |first4=Colin |title= Updating the Read Codes. User-interactive Maintenance of a Dynamic Clinical Vocabulary |journal=Journal of the American Medical Informatics Association |volume=4 |issue=6 |date=1997 |pages=465–472 |doi=10.1136/jamia.1997.0040465}}</ref> Laterly, they were maintained by the UK Terminology Centre, a division within NHS Data Standards and Products (
License application, and distribution, are now electronic only via the UKTC [https://www.uktcregistration.nss.cfh.nhs.uk Terminology Reference data Update Distribution] service.
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