62 Chapter 3 Supplementary material Methods Health boards The Aneurin Bevan University Health Board (ABU) consists of the Grange University Hospital, the Royal Gwent, Nevil Hall Hospital and Ysbyty Ystrad Fawr. The Cardiff and Vale University Health Board (CVU) covers the University Hospital of Wales, Llandough Hospital, and Velindre Cancer Centre. The Cwm Taf Morgannwg University Health Board (CTM) consists of the Royal Glamorgan Hospital, Prince Charles Hospital and Tonteg Hospital. Finally, Swansea Bay University Health Board (SBU) includes Morriston Hospital, Princess of Wales Hospital, Singleton Hospital and Neath Port Talbot Hospital. The location of the hospital that was most central for every health board was used for the location. Legal basis for sharing summary data Hospitals were asked to share anonymous summary data by making it available to us under a creative commons (CC) license https://creativecommons.org. An Attribution 4.0 International (CC BY 4.0) license means that the creator needs to be acknowledged and the data can be used and built-upon, which allowed us to efficiently collect and summarise data from many contributors. Results
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