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Investigation of the freely available easy-to-use software \u2018EZR\u2019 for            medical statistics. Bone Marrow Transplant          2013; 48: 452\u2013458.","DOI":"10.1038\/bmt.2012.244"},{"key":"5","doi-asserted-by":"crossref","unstructured":"5. Cohen              J. A            coefficient of agreement for nominal scales. Educ Psychol            Meas          1960; 20: 37\u201346.","DOI":"10.1177\/001316446002000104"},{"key":"6","doi-asserted-by":"crossref","unstructured":"6. Rainer              TH, Cheung              NK, Yeung              JH, et al.            Do trauma teams make a difference? A single centre registry            study. Resuscitation          2007; 73: 374\u2013381.","DOI":"10.1016\/j.resuscitation.2006.10.011"},{"key":"7","doi-asserted-by":"crossref","unstructured":"7. Sturms              LM, Driessen              MLS, van                Klaveren              D, et al.            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The accuracy            of preliminary diagnoses made by paramedics\u2014a cross-sectional comparative            study. Scand J Trauma Resusc Emerg Med          2020; 28: 70.","DOI":"10.1186\/s13049-020-00761-6"},{"key":"14","doi-asserted-by":"crossref","unstructured":"14. Perera              P, Mailhot              T, Riley              D, et al.            The RUSH exam: Rapid Ultrasound in SHock in the evaluation of the            critically lll. Emerg Med Clin North Am          2010; 28: 29\u201356,            viivii.","DOI":"10.1016\/j.emc.2009.09.010"},{"key":"15","doi-asserted-by":"crossref","unstructured":"15. Ramadan              A, Abdallah              T, Abdelsalam              H, et al.            Accuracy of echocardiography and ultrasound protocol to identify shock            etiology in emergency department. BMC Emerg Med          2022; 22: 117.","DOI":"10.1186\/s12873-022-00678-6"},{"key":"16","doi-asserted-by":"crossref","unstructured":"16. Yoshida              T, Yoshida              T, Noma              H, et al.            Diagnostic accuracy of point-of-care ultrasound for shock: a systematic            review and meta-analysis. Crit Care          2023; 27: 200.","DOI":"10.1186\/s13054-023-04495-6"},{"key":"17","doi-asserted-by":"crossref","unstructured":"17. Pietersen              PI, Mikkelsen              S, Lassen              AT, et al.            Quality of focused thoracic ultrasound performed by emergency medical            technicians and paramedics in a prehospital setting: a feasibility          study. 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