Background As part of its COVID-19 response, South Africa banned tobacco sales between March and August 2020. We examined ...

Format Main text – up to 3,000 words, excluding abstract, Methods, references and figure captions. Abstract – up to 200 words, unreferenced. Display items – up to 6 items (figures and/or ...

Begin with an unreferenced abstract (typically 150 words). Followed by separate sections for Introduction, Results, Discussion and Methods.