RHD and thalassemia: compared two different transfusion matching strategies (ABO, RhD, RhCcEe, versus ABO, RhD, RhCcEe, Mia, Fya, Fyb, Jka, Jkb, M, N, S, s) in a thalassaemia population in which most patients were alloimmunised prior to study entry (91%).