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. 2018 Jun 30;8(6):e020427. doi: 10.1136/bmjopen-2017-020427

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PRISMA 2009 flow diagram with reasons for exclusion. BO, Barrett’s oesophagus; HGD, high-grade dysplasia; NDBO, non-dysplastic Barrett’s oesophagus; OADC, oesophageal adenocarcinoma; OC, oesophageal cancer; OSCC, oesophageal squamous cell carcinoma; PRISMA, Preferred Reporting Items for Systematic Reviews and Meta-Analyses.