Funding for this research was provided by:
european commission (801553)
bundesministerium für gesundheit (ZMVI1-2518FSB400)
Received: 2 August 2021
Accepted: 12 December 2021
First Online: 11 January 2022
: Data protection approval was obtained from the Data Protection Officer at the Robert Koch Institute.
: Not applicable.
: The authors declare that they have no competing interests.