Funding for this research was provided by:
Received: 2 November 2020
Accepted: 18 December 2020
First Online: 11 February 2021
Ethics approval and consent to participate
: All methods were carried out in accordance with relevant guidelines and regulations. Informed consent was obtained from all patients. As a retrospective chart analysis was conducted and data were anonymized before further analysis, the need of ethics approval was waived by the ethics committee of the “Ärztekammer Hamburg”.
: Not applicable.
: The authors declare that they have no competing interests.