Evers D, van der Bom JG, Tijmensen J, de Haas M, Middelburg RA, de Vooght KM, van de Kerkhof D, Visser O, Péquériaux NC, Hudig F, Zwaginga JJ. Absence of the spleen and the occurrence of primary red cell alloimmunization in humans. Haematologica 2017; 102(8):e289-e292; https://doi.org/10.3324/haematol.2016.162685.