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Table 2 Inclusion and exclusion criteria

From: The comparative recall of Google Scholar versus PubMed in identical searches for biomedical systematic reviews: a review of searches used in systematic reviews

Inclusion criteria

Exclusion criteria

Systematic review in a medical topic

Length of search strategy greater than 256 characters

Reporting the use of both Google Scholar and PubMed

Number of hits retrieved in PubMed exceeds the reported total number of hits reviewed

Reporting in reproducible detail an identical single phrase search for these databases