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In Fig. 2d, GATA-1 tg. BtklacZ/+ females should have been numbered 1 to 3; in Fig. 3a, the last sample should have been marked G4ch no. 14; and in Fig. 4b, the last class of animal should have been tg. female.
The online version of the original article can be found at 10.1038/35020086