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subscription/membership/fee required Atypon https://journals.sagepub.com/doi/10.1016/j.wem.2010.08.015?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S1080-6032(10)00271-1
First Aid free resource MedlinePlus Health Information https://medlineplus.gov/firstaid.html
subscription/membership/fee required ClinicalKey https://www.clinicalkey.com/content/playBy/pii?v=S1080-6032(10)00271-1