1. Department of Internal Medicine, Section of Allergology & Clinical Immunology, Erasmus MC, University Medical Centre Rotterdam, 3015 GD Rotterdam, The Netherlands
2. Depertment of Peadiatric Allergology, Sophia Children Hospital, Erasmus MC, University Medical Centre Rotterdam, 3015 GD Rotterdam, The Netherlands
3. Department of Peadiatric Pulmonology & Allergology, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
4. University Medical Center Groningen, GRIAC Research Institute, University of Groningen, 9713 GZ Groningen, The Netherlands
5. Cell Biology & Immunology, Wageningen University & Research, 6708 PB Wageningen, The Netherlands
6. Department of Immunology, Erasmus MC, University Medical Centre Rotterdam, 3015 GD Rotterdam, The Netherlands
7. Food & Biobased Research, Wageningen University & Research, 6700 AA Wageningen, The Netherlands
8. FrieslandCampina, 3811 LP Amersfoort, The Netherlands
9. Dairy Science and Technology, Food Quality and Design Group, Wageningen University and Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands