Jens Kjeldsen-Kragh, Michael Kim, Mette Kjær Killie, Anne Husebekk, John Freedman and John W. Semple (2009) “In HPA 1a-immunized women the decrease in anti-HPA 1a antibody level during pregnancy is not associated with anti-idiotypic antibodies”, Haematologica. Pavia, Italy, 94(3), pp. 441-443. doi: 10.3324/haematol.13827.