RT Journal Article SR Electronic T1 Letter to the editor regarding: Multicentre, prospective, randomised study comparing the diagnostic yield of colon capsule endoscopy versus CT colonography in a screening population (the TOPAZ study) JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 214 OP 215 DO 10.1136/gutjnl-2021-324396 VO 71 IS 1 A1 Ahmed, Firas A1 Brewington, Cecelia A1 Chang, Kevin Jeffrey A1 Moreno, Courtney Coursey A1 Gollub, Marc A1 Yee, Judy YR 2022 UL http://gut.bmj.com/content/71/1/214.abstract AB