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subscription/membership/fee required Atypon https://journals.sagepub.com/doi/10.1080/08897077.2018.1485130?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
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=29949448.ui
subscription/membership/fee required Taylor & Francis https://www.tandfonline.com/doi/full/10.1080/08897077.2018.1485130
free resource scite Smart Citations https://scite.ai/reports/29949448