Case Report: Atypical motor development in a patient with the mosaic form of Down syndrome and spinal muscular atrophy type 2- long-term observation - Gajewska, Ewa; Fliciński, Jędrzej; Sobieska, Magdalena; Michalska, Joanna; Żarowski, Marcin; Steinborn, Barbara (Frontiers in Genetics, 2024)