citation journal title = Diseases of the Colon amp Rectum citation issn = 00123706 citation volume = 36 citation issue = 9 citation doi = 101007/BF02047381 citation firstpage = 844 citation lastpage = 849 citation publication date = 1993/09/01 citation title = Quantitative cultures of the mucosalassociated bacteria in the mechanically prepared colon and rectum