1. Department of Infectious Diseases Leiden University Medical Center Leiden The Netherlands
2. Centre for Infectious Disease Control National Institute for Public Health and the Environment (RIVM) Bilthoven The Netherlands
3. Faculty of Veterinary Medicine Dutch Wildlife Health Centre (DWHC) Utrecht University Utrecht The Netherlands
4. Department of Laboratory Medicine University of Texas M. D. Anderson Cancer Center Houston TX USA
5. Division Pharmacoepidemiology and Clinical Pharmacology Utrecht Institute for Pharmaceutical Sciences Utrecht The Netherlands