Funding for this research was provided by:
Institution for Statutory Accident Insurance and Prevention in the Health and Welfare Services (BGW; non-profit organisation which is part of the German social security system), Hamburg, Germany
Received: 26 November 2019
Accepted: 18 June 2020
First Online: 26 June 2020
Ethics approval and consent to participate
: The study was approved by the Medical Ethics Committee of the Hamburg Medical Association, Germany (PV5652). Prior to data collection, participants were informed about the study aims and data confidentiality and signed a declaration of informed consent.
: Not applicable.
: The authors declare that they have no competing interests.