Alcohol screening and brief intervention in police custody suites: pilot cluster randomised controlled trial (AcCePT) by Addison, M, Mcgovern, R, Angus, C, Becker, F, Brennan, A, Brown, H, Coulton, S, Crowe, L, Gilvarry, L, Hickman, M, Howel, D, Mccoll, E, Muirhead, C, Newbury-Birch, D, Waqas, M, Kaner, E