Retraction Note to: Leukemia (2020) https://doi.org/10.1038/s41375-020-0924-8, published online 21 June 2020

The Editors have retracted this Letter because it contains text that overlaps with [1] which was simultaneously under consideration by another journal when this Letter was written. Stefano Molica and Diana Giannarelli do not agree with this retraction.