Additional file 1: of Outcomes after helicopter versus ground emergency medical services for major trauma--propensity score and instrumental variable analyses: a retrospective nationwide cohort study
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Patient Characteristics and Covariate Balance of Pooled Sample and Instrumental Variable Analysis. Table that illustrates patient characteristics and covariate balance relative to fire department HEMS usage for pooled sample and instrumental variable analysis. (XLSX 16 kb)
创建时间：
2016-12-15
