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-19 mortality across facilities or nations should be considered with caution. Marked heterogeneity in COVID-19 patient volume, characteristics and mortality were observed across VA facilities nationwide. Differences in patient characteristics accounted for the majority of explained variation in mortality across sites. Variation in unadjusted COVID-19 mortality across facilities or nations should be considered with caution. To explore anticoagulant usage patterns stratified by stroke and bleeding risk in elderly patients with non-valvula