[1] University of Bergen,Institute of Medicine
[2] Centre for Research in Environmental Epidemiology (CREAL),Department of Thoracic Medicine
[3] Haukeland University Hospital,Centre for Clinical Research
[4] Haukeland University Hospital,CHU de Grenoble, INSERM U823
[5] Université Joseph Fourier-Grenoble,Municipal Institute of Medical Research (IMIM
[6] CIBER Epidemiologia y Salud Pública (CIBERESP); and Universitat Pomeu Fabra,Hospital del Mar)
[7] Epidemiologie,Institut National de la Santé et de la Recherche Médicale, Unit 700