The authors apologize for reproducing several sentences from “Human platelet lysate: Replacing fetal bovine serum as a gold standard for human cell propagation?” by Thierry Burnouf, Dirk Strunk, Mickey B.C. Koh, and Katharina Schallmoser, Biomaterials, 76, 371–387, and for failing to cite the article. Additionally, we apologize for reproducing three sentences from “Human AB serum as an alternative to fetal bovine serum for endothelial and cancer cell culture” by D. Canovas and N. Bird, ALTEX 2012;29(4):426-8, and for not citing this work. Our paper was a joint effort of an expert committee with multiple authors of which each one wrote several parts in several sections trying to reach a consensus among the experts. Therefore, within the multiple revisions the relevant citations were mishandled. Once again, we apologize to the above authors for these failures and to the readers, and thank you for your understanding.