2Talley NJ,Zinsmeister AR,Van DC,et al.Epidemiology of colonic symptoms and the irritable bowel syndrome.Gastroenterology,1991,101:927-934.
3Heaton KW,O'Donnell LJ,Braddon FE,et al.Symptoms of irritable bowel syndrome in a British urban community:consulters and nonco nsulters.Gastroenterology,1992,102:1962-1967.
4Jones R,Lydeard S.Irritable bowel syndrome in the general population.BMJ,1992,304:87-90.