Footnotes

• Contributors SC wrote the first draft of this editorial. HWRL and KG-D contributed to subsequent drafts. All the authors approved the final draft.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests SC is editor in chief of BMJ SRH and HWRL is an associate editor of BMJ SRH .

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