The availability of large databases of blood donors and transfusion recipients has facilitated investigation of associations of donor characteristics with recipient outcomes. These databases are available in Sweden-Denmark, Canada, and the Netherlands, using government health data, and in the United States, using a donor-recipient database funded by the National Heart, Lung, and Blood Institute.1
Cable RG, Edgren G. Blood Transfusions From Previously Pregnant Women and Mortality: Interpreting the Evidence. JAMA. 2017;318(15):1445–1447. doi:10.1001/jama.2017.15095
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