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Twitter @aljsassi, @SherafatAlireza
Contributors KA: responsible for conception and design, contribution to acquisition of data, analysis and interpretation of data, drafting the article and revising it. SHAJ: contributions to design, acquisition of data, analysis and interpretation of data, drafting the article and revising it. AS: contributions to design, analysis and interpretation of data, drafting the article and revising it. MF: contributions to design, analysis and interpretation of data, drafting the article and revising it.
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.