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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