The impact of donor-recipient sex matching on transplant-related complications in children after allogeneic haematopoietic stem cell transplantation – a single-centre, retrospective study - Kutnik, Paweł; Kwiatkowska, Agnieszka; Krawczyk, Dominika; Polak, Oliwia; Jawoszek, Patryk; Puchała, Daniel; Zaucha-Prażmo, Agnieszka; Kowalczyk, Jerzy (Pediatria Polska - Polish Journal of Paediatrics, 2019)