1. Institut de Recerca Sant Pau (IR SANT PAU) Barcelona Spain
2. Centro Cochrane Iberoamericano Sant Antoni Maria Claret Barcelona Spain
3. Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP) Madrid Spain
4. Department of Clinical Immunology Wrocław Medical University and ALL‐MED Medical Research Institute Wroclaw Poland
5. Swiss Institute of Allergy and Asthma Research (SIAF) University Zurich Davos Switzerland
6. Faculty of Medicine Transylvania University Brasov Romania