Funding for this research was provided by:
German Research Foundation (SFB 1027)
Article History
Received: 24 May 2019
Accepted: 20 February 2020
First Online: 3 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were approved by the Ethical Committee of Saarland Medical Association, Germany (238/03, 2016). The study was also in accordance with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.