Valk SJ, Caram-Deelder C, Groenwold RH, Evers D, de Vooght KM, van de Kerkhof D, Wondergem MJ, Péquériaux NC, Hudig F, Zwaginga JJ, Middelburg RA, van der Bom JG. Transfusion of ever-pregnant donor red blood cells and mortality of male patients. Haematologica; https://doi.org/10.3324/haematol.2023.283550 [Early view].