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Contributors All authors included in this paper fulfil the criteria of authorship by contributing substantially to the design of the work and drafting of the paper. No one else who fulfils the authorship criteria has been excluded as an author.
Funding This study was funded by Quality Enhancement Research Initiative (QUE 15-276).
Competing interests None declared.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; externally peer reviewed.