1. The University of Groningen, University Medical Center Groningen, Department of Medical Microbiology & Infection Prevention, Division of Clinical Virology, Groningen, The Netherlands
2. University Medical Center Groningen, Emergency Department, Groningen, The Netherlands
3. University Medical Center Groningen, University Medical Center Staff, Groningen, The Netherlands
4. Currently: University Medical Center Utrecht, Department of Medical Microbiology, Utrecht, The Netherlands