Correction to: Oncogene 2005; 24: 4442–4449. doi: 10.1038/sj.onc.1208635; published online 18 April 2005

Since publication of the above manuscript, the authors have identified an unintentional omission in the References, and wish to state the following:

Another paper describing the expression and invasion promoting ability of erythropoietin (EPO) and its receptor (EPOR) in head and neck cancer cells was recently published: Mohyeldin A, et al. Erythropoietin signaling promotes invasiveness of human head and neck squamous cell carcinoma. Neoplasia 2005; 7(5):537–543.