Footnotes

• Twitter @M_Maher121, @AnasMohamedMD1

• Contributors MM performed the literature review, writing, editing, provided images and submitted the article. BAZ wrote, reviewed and edited the article. AM performed the literature review, writing, and editing of the article.

• 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.