1. Department of Occupational Health; University of Groningen; Groningen the Netherlands
2. Department of Medical Microbiology and Infection Prevention Bacteriology and Hospital Hygiene; University of Groningen; Groningen the Netherlands
3. Department of Critical Care; University of Groningen; Groningen the Netherlands
4. Department of Dermatology; University Medical Centre Groningen; University of Groningen; Groningen the Netherlands