1. Department of Viroscience, Erasmus MC, Rotterdam, Netherlands.
2. Department of Hospital Pharmacy, Erasmus MC, Rotterdam, Netherlands.
3. Department of Medical Microbiology and Infectious Diseases, Erasmus MC, Rotterdam, Netherlands.
4. Department of Occupational Health Services, Erasmus MC, Rotterdam, Netherlands.
5. Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA 92037, USA.
6. Division of Infectious Diseases and Global Public Health, Department of Medicine, University of California, San Diego (UCSD), La Jolla, CA 92037, USA.