Key points are not available for this paper at this time.
Dale N. Gerding, Stuart Johnson, Lance R. Peterson, Maury E. Mulligan, Joseph Silva Jr., Clostridium difficile-Associated Diarrhea and Colitis, Infection Control and Hospital Epidemiology, Vol. 16, No. 8 (Aug., 1995), pp. 459-477
Gerding et al. (Tue,) studied this question.