Hospital-based Clostridium difficile infection surveillance reveals high proportions of PCR ribotypes 027 and 176 in different areas of Poland, 2011 to 2013 Pituch, Hanna and Obuch-Woszczatyński, Piotr and Lachowicz, Dominika and Wultańska, Dorota and Karpiński, Pawel and Młynarczyk, Grazyna and van Dorp, Sofie M and Kuijper, Ed J and the Polish Clostridium difficile Study Group, Eurosurveillance, 20, 30025 (2015), https://doi.org/10.2807/1560-7917.ES.2015.20.38.30025