Received: 5 December 2020
Accepted: 5 April 2021
First Online: 16 April 2021
: This is an ad-hoc survey with cross-sectional secondary data analysis of panel data from Forsa, a social research and market research institute. Forsa diligently observes all provisions of legal data protection in Germany. All employees of Forsa are obliged to maintain data confidentiality pursuant to § 5 of the Federal Data Protection Act (BDSG), as amended on 29 July 2009. All employees of Forsa are therefore prohibited from collecting, processing or using proprietary personal data for any other purpose than the fulfilment of the respective legitimate task. The obligation to maintain data confidentiality remains valid even after the employee has left the company (ExternalRef removed). The study sample was recruited offline and the questionnaire was provided online. Informed consent was obtained from all study participants. All data were provided and analyzed anonymously. According to statutes of the ethics committee of the Medical Faculty Charité – Universitätsmedizin Berlin, secondary data analyses do not require ethical approval according to national guidelines (e. g. Regulation (EU) 2016/679 (General Data Protection Regulation) [CitationRef removed, CitationRef removed].
: Not applicable.
: The authors declare that they have no competing interests.