Ranf, Stefanie
Gisch, Nicolas
Schäffer, Milena
Illig, Tina
Westphal, Lore
Knirel, Yuriy A
Sánchez-Carballo, Patricia M http://orcid.org/0000-0003-1061-7023
Zähringer, Ulrich
Hückelhoven, Ralph
Lee, Justin http://orcid.org/0000-0001-8269-7494
Scheel, Dierk
Article History
Received: 3 June 2014
Accepted: 11 February 2015
First Online: 2 March 2015
Competing interests
: The authors declare no competing financial interests.