Johnson, Stuart (2009). "Recurrent Clostridium difficile infection: A review of risk factors, treatments, and outcomes". Journal of Infection. 58 (6): 403–10. doi:10.1016/j.jinf.2009.03.010. PMID19394704.
Johnson, Stuart (2009). "Recurrent Clostridium difficile infection: A review of risk factors, treatments, and outcomes". Journal of Infection. 58 (6): 403–10. doi:10.1016/j.jinf.2009.03.010. PMID19394704.