V. Gonçalves, C., Evangelista, V., F. Coelho, J. ., S. Carlos, A., M. Baptista, A., & P.Graça, J. (2018). Retrospective Comparative Study Between Primary-Infection and Relapse of Clostridium difficile Disease. Internal Medicine, 25(2), 107–112. https://doi.org/10.24950/rspmi/original/268/2/2018