Houston, MartinMcMenamin, ÚnaJohnston, BrianMcDowell, RonaldHughes, CarmelMurchie, PeterCardwell, Christopher2023-10-162023-10-162023-09Houston, M, McMenamin, Ú, Johnston, B, McDowell, R, Hughes, C, Murchie, P & Cardwell, C 2023, 'Exposure to weak opioids and risk of gastrointestinal tract cancers : A series of nested case-control studies', British Journal of Clinical Pharmacology, vol. 89, no. 9, pp. 2757-2766. https://doi.org/10.1111/bcp.157590306-5251unpaywall: 10.22541/au.165831346.62538811/v1ORCID: /0000-0001-9968-5991/work/135638264https://hdl.handle.net/2164/21921Acknowledgements: We wish to thank PCCIUR, University of Aberdeen, especially Artur Wozniak, for extracting the data and performing case-control matching. This work was supported by Cancer Research UK (reference C37316/A25535). ÚMcM is supported by a UKRI Future Leaders Fellowship (MR/T019859/1). The sponsors had no involvement with the planning, execution, or completion of the study10552252engSDG 3 - Good Health and Well-beingOpioidsCodeineDihydrocodeineGastrointestinal neoplasmsOesophageal cancerGastric cancerColorectal cancerGastrointestinal MotilityR MedicineCancer Research UKC37316/A25535UK Research and Innovation (UKRI)MR/T019859/1Supplementary DataRJournal article10.1111/bcp.15759899