The Effect of Gum Chewing on Abdominal Pain and Nausea Caused by Polyethylene Glycol Solution Used for Intestinal Cleansing Before Colonoscopy: An Endoscopist-Blinded, Randomized Controlled Trial. - Aydin Sayilan, Aylin; Seyhan AK, Ezgi; Temiz, Zeynep; Öztekin, Seher Deniz; Colak, Sevgi; Pirti, Okay (Gastroenterology Nursing, 2020)