Statistics from Altmetric.com
Contributors All authors (CH, MHJ, RD, ICH and NAM) contributed to the preparation of this manuscript for publication.
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 Obtained.
Ethics approval This publication did not require Ethics Approval. Patient consent was sought for publication, and the BMJ Patient Consent Form completed by the patient.
Provenance and peer review Not commissioned; externally peer reviewed.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.