Isolated central nervous system relapses in patients with high-risk neuroblastoma -clinical presentation and prognosis: experience of the Polish Paediatric Solid Tumours Study Grou... oleh Aleksandra Wieczorek, Joanna Stefanowicz, Marcin Hennig, Elzbieta Adamkiewicz-Drozynska, Marzena Stypinska, Bozenna Dembowska-Baginska, Zuzanna Gamrot, Mariola Woszczyk, Julia Geisler, Tomasz Szczepanski, Szymon Skoczen, Marek Ussowicz, Monika Pogorzala, Szymon Janczar, Walentyna Balwierz