Name Info Provider Link
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=34982156.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34982156/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/34982156
free resource Silverchair Information Systems https://jamanetwork.com/journals/jamanetworkopen/fullarticle/10.1001/jamanetworkopen.2021.42343