[1] Merck and Co., Inc., Whitehouse Station, NJ
[2] Imperial College London, Department of Allergy and Respiratory Medicine, London
[3] National Jewish Health, Departments of Medicine and Pediatrics, Denver, CO
[4] Bernstein Allergy Group, Cincinnati, OH
[5] Johns Hopkins University School of Medicine, Department of Medicine, Baltimore, MD
[6] ALK-Abelló, Hørsholm