Is narrow-band imaging a useful tool in screening colonoscopy performed by an experienced endoscopist? A prospective randomised study on 533 patients - Romańczyk, Marcin; Romańczyk, Tomasz; Bołdys, Hubert; Koziej, Mateusz; Jarus, Krzysztof (Gastroenterology Review/Przegląd Gastroenterologiczny, 2018)