a. The article is irrelevant for the study question
b. The article does not have the relevant population
c.The article does not have the relevant intervention (or exposure)
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The article does not have a relevant comparison group
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The article does not discuss the outcome that is of interest to this research
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The article is published in a non-standard format and not suitable for review
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The article is published outside of the date ranges
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The article is a duplicate of another article