Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (kfo208)
Received: 26 September 2019
Accepted: 29 March 2020
First Online: 16 April 2020
Ethics approval and consent to participate
: The study was performed in full accordance with ethical principles, including the World Medical Association Declaration of Helsinki. The Ethical Committee of the University of Bonn gave Institutional Review Board approval for the study (181/13 as an extension to 030/12). Experimentation was undertaken with the understanding and written consent of each subject and parental consent for patients with age under 16, respectively.
: Not applicable.
: The authors declare that they have no competing interests.