Imaging alternatives to colonoscopy: CT colonography and colon capsule. European Society of Gastrointestinal Endoscopy (ESGE) and European Society of Gastrointestinal and Abdominal Radiology (ESGAR) Guideline – Update 2020. - Spada, Cristiano; Hassan, Cesare; Bellini, Davide; Burling, David; Cappello, Giovanni; Carretero, Cristina; Dekker, Evelien; Eliakim, Rami; de Haan, Margriet; Kaminski, Michal F.; Koulaouzidis, Anastasios; Laghi, Andrea; et al. (European Radiology, 2021)