An improved technique of endoscopic biopsy in the upper gastrointestinal tract.
D001706:Biopsy / Q000379:methods*; D004724:Endoscopy / Q000379:methods*; D004947:Esophagus / Q000473:pathology; D006801:Humans; D011708:Pylorus / Q000473:pathology; D013270:Stomach / Q000473:pathology