Abstract
1 Centre for Infectious Disease Control, RIVM Bilthoven, The Netherlands
2 Dutch Working Party on Antibiotic Policy (SWAB)/Erasmus Medical Center, Rotterdam, The Netherlands
3 Department of Medical Microbiology, Reference Laboratory for Clostridium difficile, Leiden University Medical Center, Leiden, The Netherlands
4 Expertise Centre for Methodology and Information Services, RIVM Bilthoven, The Netherlands
Correspondence
T. I. I. van der Kooi
tjallie.van.der.kooi{at}rivm.nl