1. Imperial College London - National Heart and Lung Institute, Royal Brompton Hospital; London; UK
2. Creighton University; Omaha; NE; USA
3. Nova Southeastern University; Davie; FL; USA
4. Swiss Institute of Allergy and Asthma Research, University of Zurich, Christine Kühne-Center for Allergy Research and Education; Davos; Switzerland
5. The University of North Carolina at Chapel Hill School of Medicine; Chapel Hill; NC; USA
6. National Jewish Health; Denver; CO; USA
7. Wroclaw Medical University; Wroclaw; Poland
8. Hôpital Arnaud de Villeneuve, University Hospital of Montpellier; Montpellier; France