Lewer, Dan and Brothers, Thomas D and Van Hest, Naomi and Hickman, Matthew and Holland, Adam and Padmanathan, Prianka and Zaninotto, Paola (2022) Causes of death among people who used illicit opioids in England, 2001–18: a matched cohort study. The Lancet, 17, (2), E126-E135. https://doi.org/10.1016/S2468-2667(21)00254-1.