Schaefer, Gerrit http://orcid.org/0000-0002-3032-8766
Pitchika, Vinay
Litzenburger, Friederike
Hickel, Reinhard
Kühnisch, Jan
Article History
Received: 6 September 2017
Accepted: 4 June 2018
First Online: 18 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed 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 research protocol was approved by the Ethics Committee of the Medical Faculty of the Ludwig-Maximilians-University of Munich (project number 013-12).
: Written informed consent was obtained from all individual participants included in the study.