Funding for this research was provided by:
Deutsche Forschungsgemeinschaft (IRTG 1328)
START program, Medical Faculty, RWTH Aachen University (690934)
Article History
Received: 1 March 2018
Accepted: 30 July 2018
First Online: 9 August 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study has been approved by the ethics committee of the University Clinic, RWTH Aachen University, Germany and has been conducted according to the ethical standards laid down in the Declaration of Helsinki. All subjects gave their informed consent prior to inclusion in the study.