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Label and ground truth methodologies by annotation method. *Marchiori et al used remote physician triage as ground truth for model training but manually derived labels for model testing. To ensure consistency in article classification, we have categorized all articles based on the ground truth method for model training. ED: emergency department; EMCI: emergency medical call incident; EMT: emergency medical technician; L&S: lights and sirens; MTS: Manchester Triage System.
