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Cross-validation of four different survey methods used to estimate illicit cigarette consumption in Brazil
- Correspondence to André Salem Szklo, Population Research Unit, Instituto Nacional de Câncer, Rio de Janeiro 20230-130, Brazil; andreszk{at}hotmail.com
Citation
Cross-validation of four different survey methods used to estimate illicit cigarette consumption in Brazil
Publication history
- Received July 1, 2020
- Revised September 12, 2020
- Accepted September 23, 2020
- First published November 13, 2020.
Online issue publication
January 08, 2022
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© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. http://creativecommons.org/licenses/by-nc/4.0/This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.