1. Occupational Diseases Department; University Hospitals; Strasbourg France
2. Department of Occupational Medicine; Faculty of Medicine; University of Strasbourg; Strasbourg France
3. Department of Epidemiology and Public Health, EA 3430; Faculty of Medicine; University of Strasbourg; Strasbourg France
4. Department of Public Health; University Hospital of Strasbourg; Strasbourg France
5. Division of Asthma and Allergy; Chest Diseases Department; University Hospitals; Strasbourg France
6. Department of Occupational Epidemiology; Occupational Safety and Health National Institut; Vandoeuvre-lès-Nancy France
7. Department of Epidemiology and Biostatistics; Paul Strauss Comprehensive Cancer Center; Strasbourg France
8. Immuno-Allergy Division; Institut Merieux; Lyon France