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Article History

Received: 31 March 2019

Accepted: 2 May 2019

First Online: 23 May 2019

Compliance with ethical standards

:

: The authors declare that they have no conflict of interest.

: The survey was approved by the ethics committee of the Hospital of the Friedrich-Schiller-University at Jena (Reference Number 5281-09/17). All procedures performed in this study were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

: Informed consent was not necessary due to the anonymity of the survey. An explanation of the aims of the survey was presented on the first page of the online questionnaire. The participants consented by filling in the questionnaire.

: The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.