1. Department of Microbiology, Clinical Center of Serbia, Belgrade, Serbia
2. National Reference Laboratory for Clostridium difficile, Department of Medical Microbiology, Leiden University Medical Center, Leiden, Netherlands
3. Center for Disease Prevention and Control, National Institute for Public Health “Dr Milan Jovacnović Batut”, Belgrade, Serbia
4. Department of Microbiology, General Hospital Užice, Užice, Serbia
5. Department of Infectious Diseases, General Hospital Užice, Užice, Serbia
6. Clinic of Orthopedic Surgery and Traumatology, Clinical Center of Serbia, Belgrade, Serbia
7. School of Medicine, University of Belgrade, Belgrade, Serbia
8. Clinic for Infectious and Tropical Diseases, Clinical Center of Serbia, Belgrade, Serbia