RT Journal Article SR Electronic T1 The Tunnel at the End of the Light: My Endoscopic Journey in Six Decades JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 602 OP 602 DO 10.7861/clinmedicine.12-6-602 VO 12 IS 6 A1 Brian P Saunders YR 2012 UL http://www.rcpjournals.org/content/12/6/602.abstract