To kontrollerede, kliniske studier, i hvilke epoetiner blev administreret til patienter med forskellige kræfttyper, inklusive hoved- halskræft og brystkræft, viste en uforklaret øget mortalitet.
Two controlled clinical studies in which epoetins were administered to patients with various cancers including head and neck cancers, and breast cancer, have shown an unexplained excess mortality.