Fig. 1From: Barrett’s oESophagus trial 3 (BEST3): study protocol for a randomised controlled trial comparing the Cytosponge-TFF3 test with usual care to facilitate the diagnosis of oesophageal pre-cancer in primary care patients with chronic acid reflux(a) Cytosponge™ expanded (left) and in gelatin capsule (right) (b) representative picture of positive TFF3 staining in a sample from a patient with BE (× 20 magnification)Back to article page