Footnotes

• Handling editor Mary Dawood

• Contributors JC oversaw programme implementation, supervision, funding acquisition, data collection and writing and revising the original draft. JC, NG and TG oversaw data management, analyses and visualisation. All authors contributed equally to the drafting and revising of the manuscript.

• Funding This work was supported by funding from the National Center for Injury Prevention and Control at the Centers for Disease Control and Prevention (R01CE003509).

• Competing interests None declared.

• Patient and public involvement Patients and/or the public were involved in the design, or conduct, or reporting, or dissemination plans of this research. Refer to the Methods section for further details.

• Provenance and peer review Not commissioned; externally peer reviewed.