Name Info Provider Link
Emergency Medical Services free resource MedlinePlus Health Information https://medlineplus.gov/emergencymedicalservices.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=34080220.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34080220/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/34080220
subscription/membership/fee required Wiley https://doi.org/10.1111/ced.14781
subscription/membership/fee required Silverchair Information Systems https://academic.oup.com/ced/article-lookup/doi/10.1111/ced.14781