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Contributors RS and MOC conceived the study and the analysis plan. TB and LD purchased the cigarette packages and did an initial data extraction. RS conducted the in-depth analysis and drafted the manuscript. MOC, TB and LD reviewed the manuscript and provided input to its finalisation.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Data sharing statement Researchers wishing to view the actual cigarette packs may contact the corresponding author RS to arrange.