Characteristics and treatment results of refractory and relapsed acute myeloid leukaemia in paediatric patients treated in Polish Paediatric Leukaemia/Lymphoma Study Group institutions according to the Protocol Acute Myeloid Leukaemia Berlin-Frankfurt-Munster 2012 and a review of novel treatment possibilities in paediatric acute myeloid leukaemia - Samborska, Magdalena; Skalska-Sadowska, Jolanta; Achkar, Robert; Wachowiak, Jacek; Derwich, Katarzyna; Czogała, Małgorzata; Balwierz, Walentyna; Skoczeń, Szymon; Dobaczewski, Grzegorz; Chybicka, Alicja; Kałwak, Krzysztof; Krawczuk-Rybak, Maryna; et al. (Contemporary Oncology/Współczesna Onkologia, 2023)