1. Institute and Clinic for Occupational, Social and Environmental Medicine; University Hospital; LMU Munich; Munich Germany
2. Comprehensive Pneumology Center Munich (CPC-M); Member of the German Center for Lung Research; Munich Germany
3. Division Materials and Air Pollutants; BAM Federal Institute for Materials Research and Testing; Berlin Germany
4. Institute of Epidemiology I; Helmholtz Zentrum München - German Research Center for Environmental Health; Neuherberg Germany