1. Institute for Prevention and Occupational Medicine of the German Social Accident Insurance Institute of the Ruhr‐Universität Bochum (IPA) Bochum Germany
2. Institute for Health Service Research in Dermatology and Nursing (IVDP) University Clinics Hamburg‐Eppendorf Hamburg Germany
3. Department of Occupational Medicine Hazardous Substances and Health Research (AGG), Institution for Statutory Accident Insurance and Prevention in the Health and Welfare Services (BGW) Hamburg Germany