Cross-validation of four different survey methods used to estimate illicit cigarette consumption in Brazil
André Salem Szklo, Roberto Magno Iglesias, Michal Stoklosa, Valeska Carvalho Figueiredo, Kevin Welding, Paulo Roberto Borges de Souza Junior, Alessandra Trindade Machado, Luis Felipe Leite Martins, Hannah Nascimento, Jeffrey Drope
Tobacco Control Jan 2022, 31 (1) 73-80; DOI: 10.1136/tobaccocontrol-2020-056060