Nasri,M R , , Khorvash,F , , Zolfaghari,M R , and Mobasherizadeh,S . "The Relative Frequency of Clostridium Difficile in Fecal Samples of Hospitalized Patients with Diarrhea by ELISA Method", Journal of Isfahan Medical School, 29, 167, 2012, 2376-2382.