BibTex format
@article{El:2022:10.1136/bmjopen-2021-059068,
author = {El, Asmar M and Laverty, A and Vardavas, C and Filippidis, F},
doi = {10.1136/bmjopen-2021-059068},
journal = {BMJ Open},
title = {How do Europeans quit using tobacco, e-cigarettes and heated tobacco products? A cross-sectional analysis in 28 European countries},
url = {http://dx.doi.org/10.1136/bmjopen-2021-059068},
volume = {12},
year = {2022}
}