and alan johnstone argued that the condition related to the "esophagus lined with gastric mucous membrane and not intra-thoracic stomach as barrett mistakenly believed." philip allison, cardiothoracic surgeon and chair of surgery at the university of oxford, suggested "calling the chronic peptic ulcer crater of the esophagus a 'barrett's ulcer'", but added this name did not imply agreement with "barrett's description of an esophagus lined with gastric mucous membrane as stomach." bani-hani ke and bani-hani kr argue that the terminology and definition of barrett's esophagus is surrounded by extraordinary confusion unlike most other medical conditions and that "he use of the eponym 'barrett's' to describe is not justified from a historical point of view". bani-hani ke and bani-hani kr investigated the historical aspects of the condition and found they could establish "how little norman barrett had contributed to the core concept of this condition in comparison to the contributions of other investigators, particularly the contribution of philip allison". a further association was made with adenocarcinoma in 1975.