1. Department of Occupational and Environmental Health and Epidemiology, Bavarian Health and Food Safety Authority, Munich, Germany
2. Institute for Medical Informatics, Biometry and Epidemiology (IBE) at the Ludwig-Maximilians-Universität München, Munich, Germany
3. Pettenkofer School of Public Health, Munich, Germany
4. Comprehensive Cancer Center of the Ludwig-Maximilians-University, Munich, Germany
5. Department of Otorhinolaryngology, University Hospital Regensburg, Regensburg, Germany
6. Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, Clinical Centre of the Ludwig-Maximilians-University, Munich, Germany