Name Info Provider Link
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=38833685.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/38833685/
subscription/membership/fee required Silverchair Information Systems https://academic.oup.com/bjr/article-lookup/doi/10.1093/bjr/tqae100