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. 2022 Oct 21;9(2):e002076. doi: 10.1136/openhrt-2022-002076

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© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Flow diagram of study selection according to the PRISMA guidelines. CTO, chronic total occlusion; PCI, percutaneous coronary intervention; PRISMA, Preferred Reporting Items for Systematic Reviews and Meta-Analyses.