1. Competence Centre for Epidemiology and Health Services Research for Healthcare Professionals (CVcare) University Medical Centre Hamburg‐Eppendorf (UKE) Hamburg Germany
2. Institute for Occupational and Maritime Medicine University Medical Centre Hamburg‐Eppendorf (UKE) Hamburg Germany
3. Department of Occupational Medicine Hazardous Substances and Public Health (AGG), Institution for Statutory Accident Insurance and Prevention in the Health and Welfare Services (BGW) Hamburg Germany