RT Journal Article SR Electronic T1 Cost-effectiveness of patency capsule test prior to wireless capsule endoscopy JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP s30 OP s31 DO 10.7861/clinmed.20-2-s30 VO 20 IS Suppl 2 A1 Keeley Fairbrass A1 Deloar Hoshen A1 Helen Bailey A1 Jason Jennings A1 Venkat Subramanian YR 2020 UL http://www.rcpjournals.org/content/20/Suppl_2/s30.abstract