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)
The article does not have a relevant comparison group
The article does not discuss the outcome that is of interest to this research
The article is published in a non-standard format and not suitable for review
The article is published outside of the date ranges
The article is a duplicate of another article