Quitting behavior during the tobacco sales ban in South Africa: Results from a broadly nationally representative survey.

"CONFLICTS OF INTEREST The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. The authors declare that they have no competing interests, financial or otherwise, related to the current work. All the authors report that since the initial planning of the work they received funding from the African Capacity Building Foundation, Bill and Melinda Gates Foundation and support from National Income Dynamics Study – Coronavirus Rapid Mobile Survey. C. van Walbeek and S. Filby report that in the past 36 months, the Research Unit on the Economics of Excisable Products (REEP), of which C. van Walbeek is the Director, received funding from Cancer Research UK and CDC Foundation for tobacco control research and policy work. Also, C. van Walbeek reports that in the past 36 months Research Unit on the Economics of Excisable Products (REEP) received funding from International Development Research Centre (Canada) for research on the economics of sugar-sweetened beverages. All the authors report that in the past 36 months they received consulting fees from DG Murray Trust for a study on the impact of reduced trading hours on alcohol consumption in the Western Cape, South Africa. Also, C. van Walbeek reports that in the past 36 months he received consulting fees from World Bank and PAHO for a study on earmarking health taxes in Jamaica, Dominica and Botswana. He also reports that he received support for attending meetings on tobacco taxation in Panama and Suriname from Cancer Research UK and for attending meetings in Kenya from Tax Justice Network Africa. C. van Walbeek reports that he is a Member of the Board of the Tobacco, Alcohol and Gambling Advisory, Advocacy and Action Group and that he does not receive payments for this position. Also, he reports that concerning Unit trusts, the asset allocation is not under his control. R. Hill reports that in the past 36 months he received payment from Research Unit on the Economics of Excisable Products (REEP) for his assistance in writing up the manuscript for this article. Finally, S. Filby reports that in the past 36 months she received office machinery from Research Unit on the Economics of Excisable Products (REEP)."

"FUNDING This research is funded from the African Capacity Building Foundation, grant number 334, ERA 0000065, in turn funded by the Bill & Melinda Gates Foundation."