Title: Endoscopy and biopsy of esophagus, stomach, and duodenum
Subjects: Atlases, Stomach, Biopsy, Duodenal Diseases, Esophagoscopy, Esophageal Diseases, Diagnosis, Duodenoscopy, Stomach Diseases, Esophagus, Gastroscopy, Duodenum, Duodenal diseases, Esophageal diseases, Stomach diseases, Needle biopsy