41. He advanced this position in a guest editorial in the Journal of Clinical Gastroenterology in 1983. 42. In 2007, he became the Chief of Gastroenterology and Hepatology at Baylor College of Medicine. 43. Gastroenterology is a national key discipline.44. Upon graduation Sanchez moved to New York City to specialize in gastroenterology at New York University. 45. He graduated as a doctor in 1920 and specialized in gastroenterology in Paris ( 1933 ). 46. He studied medicine at Oxford University and St Thomas'Hospital, and specialised in gastroenterology . 47. Mayer served as Director of the Mount Sinai's Division of Gastroenterology from 2003 2010. 48. He is also the author of a textbook of gastroenterology , now in its third edition. 49. Boston Scientific makes medical devices used in cardiology, gastroenterology , pulmonary medicine and other medical specialties. 50. Although Wu had a series of gastroenterology surgeries, doctors found it difficult to diagnose her condition.
