title: The etiology of ano-rectal fistulae. A statistical report.
mesh_terms: D005163:Factor Analysis, Statistical; D005260:Female; D005401:Fissure in Ano / Q000209:etiology*; D006801:Humans; D008297:Male; D012003:Rectal Fistula / Q000209:etiology*; D011795:Surveys and Questionnaires