Footnotes

• Twitter @sgmemtsoudis, @jashvant_p

• Contributors SGM helped design the study, conduct the study, analyze the data, write the manuscript and has approved the final manuscript. CC helped design the study, conduct the study, analyze the data and write the manuscript and has approved the final manuscript. JP helped design the study, conduct the study, analyze the data and write the manuscript and has approved the final manuscript.

• 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.