Spiekermann et al. Vol. 196, No. 3, August 5, 2002. Pages 303–310.

The species origin of the Epo–Fc fusion protein described in the paper by Spiekermann and colleagues was erroneously described and comprises mouse Epo fused to human Fc (IgG1 derived). All DNA sequencing and oligonucleotides stated in the paper are correct for this mouse Epo–human Fc construct. This does not affect the experimental results or interpretation. The authors apologize for any confusion that this may have caused.