Christine Damm-Welk, Nina Kutscher, Martin Zimmermann, Andishe Attarbaschi, Jutta Schieferstein, Fabian Knörr, Ilske Oschlies, Wolfram Klapper, Wilhelm Woessmann. Quantification of minimal disseminated disease by quantitative polymerase chain reaction and digital polymerase chain reaction for NPM-ALK as a prognostic factor in children with anaplastic large cell lymphoma. Haematologica 2020;105(8):2141-2149; https://doi.org/10.3324/haematol.2019.232314.