Impact of an information video before colonoscopy on patient satisfaction and anxiety - Arabul, Mahmut; KANDEMİR, Altay; Çelik, Mustafa; Alper, Emrah; Akpınar, Zehra; Aslan, Fatih; VATANSEVER, Sezgin; Ünsal, Belkıs (Turkish Journal of Gastroenterology, 2012)