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Screening algorithm. Natural language processing (NLP)–based transfusion-related acute lung injury (TRALI) screening algorithm. Asterisk indicates that, in the absence of a PaO2 :Fio2 ratio, surrogate markers of hypoxemia used in order of availability were PaO2 ≤117 mmHg followed by SpO2 ≤97%. CXR = chest radiograph; plus sign (+) = positive.
