Erratum to: Emergence of Clostridium difficile infection in tuberculosis patients due to a highly rifampicin-resistant PCR ribotype 046 clone in Poland - P. Obuch-Woszczatyński; G. Dubiel; C. Harmanus; E. Kuijper; U. Duda; D. Wultańska; A. Belkum; H. Pituch (European Journal of Clinical Microbiology & Infectious Diseases, 2013)