1. Department of Allergology; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
2. University of Groningen; University Medical Center Groningen; GRIAC Research Institute; Groningen The Netherlands
3. Department of Hematology; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
4. Department of General Practice; University of Groningen; University Medical Center Groningen; Groningen The Netherlands