Baier, Daniel
Teren, Andrej
Wirkner, Kerstin
Loeffler, Markus
Scholz, Markus http://orcid.org/0000-0002-4059-1779
Article History
Received: 20 February 2018
Accepted: 8 May 2018
First Online: 15 May 2018
<!--Emphasis Type='Bold' removed-->Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study protocol was approved by the responsible institutional ethics board of the Medical Faculty of the University of Leipzig (263-2009-14122009) and was performed adhering to the principles of the Declaration of Helsinki.
: All participants provided written informed consent.