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. 2017 Jan 23;7(1):e012520. doi: 10.1136/bmjopen-2016-012520

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

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Overview of study methodology. (NHS hospitals can be administratively structured as acute trusts, including multiple hospitals. Additionally, some hospitals can obtain foundation trust status, enjoying significant managerial and financial freedom.) IPC, infection prevention and control; NHS, National Health Service; RAG, Red-Amber-Green; T, trust.