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Contributors MF is responsible for the overall content as guarantor, he proposed and designed the study, assisted in data collection, and was the editor of the manuscript. LO wrote the proposal for the study, received ethics approval, collected data and wrote the manuscript. SCS conducted a literature review, collected data and helped edit the manuscript. Dr Khanna and Dr Adili assisted with review of de-identified data. Dr Lawrence Mbuagbaw assisted with manuscript review.
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.