Footnotes

• Twitter @Colly_Wabbles, @mijkboyle

• Contributors MAB came up with the idea. Both CPM and MAB attended the patient counselling session which gave rise to the clinical scenario. CPM performed the literature search and wrote the article. MAB provided critical feedback and made appropriate edits, suggesting further topics of discussion. CPM is the guarantor.

• 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; externally peer reviewed.