Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0300-9572(15)00361-5
Emergency Medical Services free resource MedlinePlus Health Information https://medlineplus.gov/emergencymedicalservices.html
subscription/membership/fee required ClinicalKey https://www.clinicalkey.com/content/playBy/pii?v=S0300-9572(15)00361-5