Footnotes

• Twitter @marianascarant1

• Contributors MS, MCM-M, and CG performed the literature searches. All authors contributed to manuscript writing and approved the final version.

• 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 MS has received personal fees from AstraZeneca and personal fees from Merck Sharp and Dohme outside the submitted work. CG and MCM-M have nothing to disclose.

• Patient consent for publication Not required.

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