Funding for this research was provided by:
Else Kröner-Fresenius-Stiftung (Grant A109)
Kommission für Innovative Medizinische Forschung an der Medizinischen Fakultät Muenster (IMF Grant SP 11 18 15)
Text and Data Mining valid from 2018-12-06
Received: 20 August 2018
Revised: 2 November 2018
Accepted: 27 November 2018
First Online: 6 December 2018
Compliance with ethical standards
: JS has been supported by the ‘Else-Kröner-Fresenius Stiftung’ (Grant A109) and by ‘Kommission für Innovative Medizinische Forschung an der Medizinischen Fakultät Muenster’ (IMF Grant SP 11 18 15) outside this work.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study was approved by the local Ethics Committee of the University of Düsseldorf.
: Informed consent was obtained from all individual participants included in the study.