Publisher Correction: Significant association of cutaneous adverse events with hydroxyurea: Results from a prospective non-interventional study in BCR-ABL1-negative myeloproliferative neoplasms (MPN) - on behalf of the German Study Group-MPN (Leukemia, (2021), 35, 2, (628-631), 10.1038/s41375-020-0945-3).