From the Centers for Disease Control and Prevention. Knowledge about causes of peptic ulcer disease--United States, March-April 1997.
D000328:Adult; D001364:Awareness; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D010353:Patient Education as Topic; D010437:Peptic Ulcer / Q000209:etiology / Q000517:prevention & control*; D014481:United States