Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (Open Access Publishing Fund of University of Tübingen)
Received: 20 June 2019
Accepted: 24 November 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: Not applicable.
: Written informed consent was obtained from the patient.
: The authors declare that they have no competing interests.