RT Journal Article SR Electronic T1 Smoke-free vehicles – impact of legislation on child smoke exposure across three countries JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2004600 DO 10.1183/13993003.04600-2020 A1 Laverty, Anthony A A1 Filippidis, Filippos T A1 Been, Jasper V A1 Campbell, Frances A1 Cheeseman, Hazel A1 Hopkinson, Nicholas S YR 2021 UL http://erj.ersjournals.com/content/early/2021/09/09/13993003.04600-2020.abstract AB