Ducamp S, Luscieti S, Ferrer-Cortès X, Nicolas G, Manceau H, Peoc’h K, Yien YY, Kannengiesser C, Gouya L, Puy H, Sanchez M. A mutation in the iron-responsive element of ALAS2 is a modifier of disease severity in a patient suffering from CLPX associated erythropoietic protoporphyria. Haematologica 2021;106(7):2030-2033; https://doi.org/10.3324/haematol.2020.272450.