1 Associate Editor, Postgraduate Medical Journal, London, UK
Correspondence to Dr John Launer, London, UK; [email protected]
Twitter @JohnLauner
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.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; internally peer reviewed.