Funding for this research was provided by:
Bundesministerium für Gesundheit (ZMVI1-2520COR402)
Deutsche Forschungsgemeinschaft (HO 6565/2-1)
Received: 14 April 2021
Accepted: 14 September 2021
First Online: 26 September 2021
: This study was approved by the ethics committee of the Berlin Chamber of Physicians (Berliner Ärztekammer, reference number Eth-11/20), and the data commissioner of the Robert Koch Institute. All participants gave written informed consent.
: Not applicable.
: All authors declare no competing interest.