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Contributors All authors contributed significantly to this. Work conception; data search, screening and extraction; data analysis: TR and MD. Manuscript writing: TR. Manuscript, revision and approval: all coauthors. TR, ML and MD take responsibility for the integrity of the work as a whole, from inception to published article.
Funding MD receives a salary award from the Fonds de Recherche du Québec-Santé. There was no specific funding received for this study.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Patient consent for publication Not required.