Table 3.

Considered but excluded databases

Database	Disciplines	Exclusion reason
ACL Anthology	Machine learning and artificial intelligence	Poster and conference proceedings
arXiv (Cornell University)	Machine learning and artificial intelligence	Pre-print server
DBLP Computer Science Bibliography	Machine learning and artificial intelligence	Limited search options (by publication only) Pilot searches returned poor results
EMBASE	Biomedicine	Unable to access
Google Scholar	Clinical medicine Health services research Physics Chemistry Engineering Machine learning and artificial intelligence	Searches difficult to refine Large volume of irrelevant results
Papers With Code	Machine learning and artificial intelligence	No advanced search option Could not restrict to peer reviewed journal papers
Research Square	Biomedicine	Mainly preprints No advanced search option No export option