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. 2015 Mar 20;16:103. doi: 10.1186/s13063-015-0624-2

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© Kyriacos et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Flow diagram of criterion-based record review process of trial. Note on figure: All records were sampled from the six research wards. CliniCom database, the electronic hospital information system; GA, general anaesthetic; HDU, high dependency unit; ICU, intensive care unit.