Received: 9 May 2019
Accepted: 11 July 2019
First Online: 16 July 2019
Compliance with ethical standards
: This research received financial support by the Deutsche Forschungsgemeinschaft to TH (DFG HU411/18–1). All other authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants 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. The study was approved by the Ethics committee of the Medical Faculty of the Technical University of Dresden(EK441102016). This article does not contain any studies with animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.