Gastric ulcer.
D000367:Age Factors; D004381:Duodenal Ulcer / Q000209:etiology; D005260:Female; D005743:Gastrectomy; D005753:Gastric Mucosa / Q000378:metabolism; D005756:Gastritis / Q000150:complications; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans; D008297:Male; D009790:Occupations; D010437:Peptic Ulcer / Q000150:complications / Q000209:etiology; D012737:Sex Factors; D013274:Stomach Neoplasms / Q000175:diagnosis / Q000601:surgery