TY - BOOK AU - Cotton,Peter B. TI - Advanced digestive endoscopy: practice and safety SN - 1405158581 PY - 2008/// CY - Malden, Mass. PB - Blackwell Pub. KW - Endoscopy, Digestive system KW - Methods KW - Endoscopy, Digestive System KW - standards KW - Digestive system diseases KW - Diagnosis ER -