Berghäuser, Gunnar
Bernal-Villamil, Ivan
Schmidt, Robert http://orcid.org/0000-0002-8856-3347
Schneider, Robert
Niehues, Iris
Erhart, Paul http://orcid.org/0000-0002-2516-6061
Michaelis de Vasconcellos, Steffen http://orcid.org/0000-0003-3584-0635
Bratschitsch, Rudolf http://orcid.org/0000-0002-2368-2548
Knorr, Andreas
Malic, Ermin
Article History
Received: 11 July 2017
Accepted: 7 February 2018
First Online: 6 March 2018
Competing interests
: The authors declare no competing interests.