Efficiency and safety of one-year anti-TNF-α treatment in Crohn’s disease: a Polish single-centre experience - Sochal, Marcin; Krzywdzińska, Monika; Gabryelska, Agata; Talar-Wojnarowska, Renata; Małecka-Panas, Ewa (Gastroenterology Review/Przegląd Gastroenterologiczny, 2020)