Funding for this research was provided by:
Technische Universität Dresden
Received: 5 February 2020
Accepted: 2 August 2021
First Online: 31 August 2021
: Due to anonymous data selection from the health records informed consent from the participants was not required. The study was approved by the institutional review board of the Medical Faculty of the Technische Universität Dresden (No: EK31012016) and has been performed in accordance with the World Medical Association Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests (according to the ICMJE recommendations).