Received: 20 October 2020
Accepted: 4 February 2021
First Online: 21 February 2021
Ethics approval and consent to participate
: The survey was approved by the ethical review committee of the TU Dresden (reference number: SR-EK-8012020) and conducted according to the recommendations of the Helsinki Declaration. All participants provided informed consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.