1. Institute for Occupational and Social Medicine; RWTH Aachen University; Faculty of Medicine; Pauwelsstraße 30 52074 Aachen Germany
2. Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine; Friedrich-Alexander University Erlangen-Nürnberg (FAU); Schillerstraße 25 and 29 91054 Erlangen Germany
3. Helmholtz Zentrum München; Ingolstädter Landstraße 1 85764 Neuherberg Germany