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. 2021 Jun 15;11(6):e043966. doi: 10.1136/bmjopen-2020-043966

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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PRISMA flow diagram. *Includes guidelines, recommendation-based reviews, projections or estimations without mention of true changes to surgical programming. PRISMA, Preferred Reporting Items for Systematic Reviews and Meta-Analyses.