Gastric ulcer: its diagnosis and differentiation by gastroscopic and roentgenological examination.
D002454:Cell Differentiation; D005773:Gastroscopy; D006801:Humans; D010437:Peptic Ulcer / Q000000981:diagnostic imaging*; D011859:Radiography; D013276:Stomach Ulcer
GASTROSCOPY; PEPTIC ULCER/radiography