Prospective study of gram-stained stool smears in diagnosis of Clostridium difficile colitis.
Shanholtzer CJ, Peterson LR, Olson MN, Gerding DN. Prospective study of gram-stained stool smears in diagnosis of Clostridium difficile colitis. J Clin Microbiol. 1983 May; 17(5):906-8.