Endoscopy and gastric ulceration before cimetidine.
D001706:Biopsy; D002927:Cimetidine / Q000627:therapeutic use*; D005773:Gastroscopy; D006801:Humans; D013274:Stomach Neoplasms / Q000175:diagnosis*; D013276:Stomach Ulcer / Q000473:pathology*
D002927:Cimetidine