Databases Interfaces Results Dates
Embase ovidsp.ovid.com 2,715 6th December 2021
MEDLINE (PubMed) pubmed.ncbi.nlm.nih.gov 1,968 6th December 2021
The Cochrane Library cochranelibrary.com 157 6th December 2021
Total - 4,865 -
After duplicate-removal - 3,535 -