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Shorter, G W and Heather, N and Bray, Jeremy W and Giles, E L and Holloway, A and Barbosa, C and Berman, A H and O'Donnell, A J and Clarke, M and Stockdale, K J and Newbury-Birch, D (2017) The 'Outcome Reporting in Brief Intervention Trials: Alcohol' (ORBITAL) framework: protocol to determine a core outcome set for efficacy and effectiveness trials of alcohol screening and brief intervention. Trials, 18, (1), 611. https://doi.org/10.1186/s13063-017-2335-3.