title: Haemorrhoids--postulated pathogenesis and proposed prevention.
mesh_terms: D001003:Anal Canal / Q000033:anatomy & histology; D002986:Clinical Trials as Topic; D003672:Defecation; D005247:Feeding Behavior; D006484:Hemorrhoids / Q000453:epidemiology / Q000209:etiology* / Q000517:prevention & control; D006801:Humans