BibTex format
@article{Laverty:2021:10.1136/thoraxjnl-2020-215708,
author = {Laverty, AA and Millett, C and Hopkinson, NS and Filippidis, FT},
doi = {10.1136/thoraxjnl-2020-215708},
journal = {Thorax},
pages = {89--91},
title = {Introduction of standardised packaging and availability of illicit cigarettes: a difference-in-difference analysis of European Union survey data 2015-2018.},
url = {http://dx.doi.org/10.1136/thoraxjnl-2020-215708},
volume = {76},
year = {2021}
}