Footnotes

• Contributors PM developed the questionnaire and the online form and made initial contact with the clinicians. She collated and analysed the data and wrote the first draft of the paper and subsequent edits. AS supported the development of the questionnaire, contacted the non-responders and provided input to the subsequent edits of the manuscript and all other aspects of the work. AKE conceptualised and initiated the study, contacted non-responders, supervised the data analysis and contributed to subsequent versions of the manuscript with overall responsibility for the final version.

• Competing interests None declared.

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