Department of Dermatology and Allergy, Comprehensive Allergy Center, Charité, and Berlin Institute of Health, Comprehensive Allergy Center, Universitätsmedizin Berlin, Humboldt-Universität zu Berlin, Berlin, Germany, jean.bousquet@orange.fr. University Hospital and MACVIA France, Montpellier, France, jean.bousquet@orange.fr. Medical Consulting Czarlewski, Levallois, France. MASK-air, Montpellier, France. Department of Dermatology and Allergy, Comprehensive Allergy Center, Charité, and Berlin Institute of Health, Comprehensive Allergy Center, Universitätsmedizin Berlin, Humboldt-Universität zu Berlin, Berlin, Germany. Rhinology Unit & Smell Clinic, ENT Department, Hospital Clinic - Clinical & Experimental Respiratory Immunoallergy, IDIBAPS, CIBERES, Universitat de Barcelona, Barcelona, Spain. Department of Geriatrics, Montpellier University Hospital, Montpellier, France. Laboratoire de Biochimie et Hormonologie, PhyMedExp, Université de Montpellier, INSERM, CNRS, CHU de, Montpellier, France. CIBER Fisiopatologia de la Obesidad y Nutrición (CIBEROBN), Madrid, Spain. IMIM (Hospital del Mar Research Institute), Barcelona, Spain. Departament de Ciències Experimentals i de la Salut Toxicologia, Universitat Pompeu Fabra (UPF), Barcelona, Spain. Maladies Infectieuses et Tropicales, CHU, Montpellier, France. University Hospital and MACVIA France, Montpellier, France. Faculty of Medicine, Transylvania University, Brasov, Romania. Christine Kühne - Center for Allergy Research and Education (CK-CARE), Swiss Institute of Allergy and Asthma Research (SIAF), University of Zurich, Zurich, Switzerland. Personalized Medicine, Asthma and Allergy, Humanitas Clinical and Research Center IRCCS and Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy. Fundação ProAR, Federal University of Bahia and GARD/WHO Planning Group, Salvador, Brazil. Division of Allergy, The Bambino Gesù Children's Research Hospital IRCCS, Rome, Italy. CINTESIS, Center for Research in Health Technologies and Information Systems, Faculdade de Medicina da Universidade do Porto, Porto, Portugal. MEDIDA, Lda, Porto, Portugal. GreenUPorto - Sustainable Agrifood Production Research Centre, DGAOT, Faculty of Sciences, University of Porto, Vila do Conde, Portugal. Department of Pulmonary Diseases, Istanbul University-Cerrahpasa, Cerrahpasa Faculty of Medicine, Istanbul, Turkey. Skin and Allergy Hospital, Helsinki University Hospital, and University of Helsinki, Helsinki, Finland. Interdepartmental Center of Research on Hypertension and Related Conditions CIRIAPA, Federico II University, Napoli, Italy. Servicio de Alergia e Immunologia, Clinica Santa Isabel, Buenos Aires, Argentina. Department of Clinical Immunology, Wrocław Medical University and ALL-MED Medical Research Institute, Wrocław, Poland. Center for Rhinology and Allergology, Wiesbaden, Germany. Department of Otorhinolaryngology, Head and Neck Surgery, Semmelweis University, Budapest, Hungary. Division of Internal Medicine, Asthma and Allergy, Barlicki University Hospital, Medical University of Lodz, Lodz, Poland. Center of Excellence in Asthma and Allergy, Médica Sur Clinical Foundation and Hospital, Mexico City, Mexico. Institute for Population Health Sciences, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, United Kingdom. Institute of Environmental Medicine, Karolinska Institutet and Sachs' Children's Hospital, Stockholm, Sweden. Department of Otorhinolaryngology, Chiba University Hospital, Chiba, Japan. Division of Infection, Immunity & Respiratory Medicine, Royal Manchester Children's Hospital, University of Manchester, Manchester, United Kingdom. Allergy Department, 2nd Pediatric Clinic, Athens General Children's Hospital "P&A Kyriakou," University of Athens, Athens, Greece. Section of Rhinology and Allergy, Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Marburg, Philipps-Universität Marburg, Marburg, Germany. Allergy and Clinical Immunology Unit, Centro Hospitalar e Universitário de Coimbra, Faculty of Medicine, Institute of Immunology, University of Coimbra, Coimbra, Portugal. Faculty of Medicine, ICBR - Institute for Clinical and Biomedical Research, CIBB, University of Coimbra, Coimbra, Portugal. CHU Toulouse, Toulouse, France. Department of Otolaryngology-Head and Neck Surgery, Eye and Ear University Hospital, Beirut, Lebanon. Department of Prevention of Environmental Hazards and Allergology, Medical University of Warsaw, Warsaw, Poland. Usher Institute, The University of Edinburgh, Edinburgh, United Kingdom. Vilnius University Faculty of Medicine, Institute of Clinical Medicine & Institute of Health Sciences, Vilnius, Lithuania. Research and Development Division, Microbiology and Functionality Research Group, World Institute of Kimchi, Gwangju, Republic of Korea. Strategy and Planning Division, SME Service Department, World Institute of Kimchi, Gwangju, Republic of Korea. CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain. ISGlobAL, Barcelona, Centre for Research in Environmental Epidemiology, Barcelona, Spain.