Footnotes

• Twitter @DrCBattersby, @chinthikap

• Contributors HLM designed the survey. HLM and TL wrote the manuscript and CB, AD and CP were responsible for dissemination of the survey. AD, CB and CP provided feedback on the manuscript and TL was responsible for supervision of the project as a whole.

• 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 None declared.

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