1. Department of Medical Informatics, Biometry and Epidemiology, Professorship of Epidemiology and Public Health, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Erlangen , Germany
2. Arbeitsgemeinschaft Dermatologische Prävention , Buxtehude , Germany
3. Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) , Erlangen , Germany