RT Journal Article SR Electronic T1 Radiological landmarks at the oesophago-gastric junction. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 499 OP 510 DO 10.1136/thx.21.6.499 VO 21 IS 6 A1 Berridge, F R A1 Friedland, G W A1 Tagart, R E YR 1966 UL http://thorax.bmj.com/content/21/6/499.abstract AB