37 Allergy Unit. Hospital Infantil Universitario Niño Jesús, Madrid, Spain.
38 Department of Allergy, CIBER of Respiratory Diseases (CIBERES), Fundación Jiménez Díaz, Madrid, Spain.
39 Child Life and Health and Centre for Inflammation Research, The University of Edinburgh, Edinburgh, UK.
40 University of Insubria, Varese, and ICS Maugeri, IRCCS, Tradate, Italy.
41 Respiratory Research Unit, Department of Respiratory Medicine, Hvidovre Hospital and Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark.
42 University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
43 Department of Pulmonology, Groningen Research Institute for Asthma and COPD Research Institute, Groningen, The Netherlands.
44 Department of Respiratory Medicine, First Faculty of Medicine of Charles University, Thomayer Hospital, Prague, Czech.