1. Faculty of Medicine; Institute of Clinical Medicine; University of Oslo; Oslo Norway
2. Department of Pathophysiology and Allergy Research; Centre of Pathophysiology, Infectology and Immunology; Medical University of Vienna; Vienna Austria
3. Department of Pediatrics; Oslo University Hospital; Oslo Norway
4. Institute of Environmental Medicine; Karolinska Institutet and Sachs' Children and Youth Hospital; Stockholm Sweden
5. University Hospital Montpellier; Montpellier France
6. MACVIA-LR; Fighting Chronic Diseases for Healthy Ageing; Région Languedoc Roussillon France
7. Centre for Research in Environmental Epidemiology (CREAL); IMIM (Hospital del Mar Medical Research Institute); Departament de Ciències Experimentals i de la Salut; Universitat Pompeu Fabra; CIBER Epidemiologìa y Salud Pùblica; Barcelona Spain