Dias, M. Beatriz Souza, et al. “ Pseudo-Outbreak of Clostridium Difficile Associated Diarrhea (CDAD) in a Tertiary-Care Hospital ”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 52, no. 3, June 2010, pp. 133-7, https://revistas.usp.br/rimtsp/article/view/31320.