Letter: Endoscopy in dyspepsia.
D000328:Adult; D001706:Biopsy; D004381:Duodenal Ulcer / Q000175:diagnosis; D004415:Dyspepsia / Q000175:diagnosis*; D004724:Endoscopy; D005260:Female; D005753:Gastric Mucosa; D006801:Humans; D008297:Male; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000175:diagnosis; D013276:Stomach Ulcer / Q000175:diagnosis