Allard P, Alhaj N, Lobitz S, Cario H, Jarisch A, Grosse R, Oevermann L, Hakimeh D, Tagliaferri L, Kohne E, Kopp-Schneider A, Kulozik AE, Kunz JB. Genetic modifiers of fetal hemoglobin affect the course of sickle cell disease in patients treated with hydroxyurea. Haematologica 2022;107(7):1577-1588; https://doi.org/10.3324/haematol.2021.278952.