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Tobacco 21 policies in California and Hawaii and sales of cigarette packs: a difference-in-differences analysis
- Correspondence to Dr Fatma Romeh M Ali, Office on Smoking and Health, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA; fatma_romeh{at}feps.edu.eg
Citation
Tobacco 21 policies in California and Hawaii and sales of cigarette packs: a difference-in-differences analysis
Publication history
- Received February 26, 2019
- Revised August 27, 2019
- Accepted August 30, 2019
- First published October 23, 2019.
Online issue publication
August 25, 2020
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© Author(s) (or their employer(s)) 2020. No commercial re-use. See rights and permissions. Published by BMJ.