Conner, Mark, Grogan, Sarah, Simms‐Ellis, Ruth, COWAP, Lisa, Armitage, Christopher J., West, Robert, Marshall, Anna‐Marie and Siddiqi, Kamran (2021) Association between age at first reported e‐cigarette use and subsequent regular e‐cigarette, ever cigarette and regular cigarette use. Addiction. ISSN 0965-2140