BMJ Open Hickman, M, Dillon, J, Elliot, L, De Angelis, D, Vickerman, P, Foster, G, Donnan, P T, Eriksen, A, Flowers, P, Goldberg, D, Hollingworth, W, Ijaz, S, Liddell, D, Mandal, S, Martin, N, Beer, L, Drysdale, K, Fraser, H, Glass, R, Graham, L, Gunson, R, Hamilton, E, Harris, H, Harris, M, Harris, R, Heinsbroek, E, Hope, V, Horwood, J, Inglis, S K, Innes, H, Lane, J A, Meadows, J, McAuley, A, Metcalfe, C, Migchelsen, S, Murray, A, Myring, G, Palmateer, N, Presanis, A, Radley, A, Ramsay, M, Samartsidis, P, Simmons, R, Sinka, K, Vojt, G, Ward, Z, Whiteley, D, Yeung, A & Hutchinson, S 2019, ' Evaluating the Population Impact of Hepatitis C Direct Acting Antiviral Treatment as Prevention for People Who Inject Drugs (EPIToPe) – a natural experiment (Protocol) ', BMJ Open, vol. 9, no. 9, e029538 . https://doi.org/10.1136/bmjopen-2019-029538