Golowin, Roman
Portnyagin, Maxim
Hoernle, Kaj http://orcid.org/0000-0002-3165-3480
Hauff, Folkmar
Gurenko, Andrey
Garbe-Schönberg, Dieter
Werner, Reinhard
Turner, Simon
Article History
Received: 18 September 2015
Accepted: 16 December 2016
First Online: 9 February 2017
Competing interests
: The authors declare no competing financial interests.