The search was conducted by the first author (EM) across all databases and an initial screening was independently conducted by two authors (EM and CP) using the PRISMA Flowchart (Fig. ). Each of the reviewers removed the duplicates in the initial screening process and potentially relevant full-text articles were obtained. The authors reviewed all studies based on the eligibility criteria, by reading all titles, followed by selected abstracts, full texts and references. In the occurrence of uncertainty whether an article met inclusion criteria, the first author consulted the senior authors. All disagreements were resolved by discussion and consensus with the senior reviewers CH and AM.
PRISMA flowchart study selection
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