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Contributors RC oversaw the histological comparison study and ran the OSNA assays. LMW carried out the histopathology. The other authors managed the patient recruitment, led by TY. RC drafted the manuscripts and all authors contributed to the editing.
Funding The Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), the Oxford Colon Cancer Trust (OCCTOPUS) and the Bowel Disease Research Foundation (BDRF).
Competing interests None declared.
Ethics approval Oxfordshire Research and Ethics Committee A (reference 10/H0724/13).
Provenance and peer review Not commissioned; externally peer reviewed.
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