Uncommon reasons of the digestive tract-related paraneoplastic syndromes in children with neuroblastic tumors: three case reports - Czkwianianc, Elżbieta; Zalewska-Szewczyk, Beata; Kobos, Józef; Socha-Banasiak, Anna; Janczar, Szymon; Prymus-Kasińska, Sylwia; Kazanek-Zasada, Joanna; Młynarski, Wojciech (Contemporary Oncology/Współczesna Onkologia, 2018)