Walker, Alesia
Pfitzner, Barbara
Neschen, Susanne
Kahle, Melanie
Harir, Mourad
Lucio, Marianna
Moritz, Franco
Tziotis, Dimitrios
Witting, Michael
Rothballer, Michael
Engel, Marion
Schmid, Michael
Endesfelder, David
Klingenspor, Martin
Rattei, Thomas
zu Castell, Wolfgang
de Angelis, Martin Hrabé
Hartmann, Anton
Schmitt-Kopplin, Philippe
Article History
Received: 3 December 2013
Revised: 25 March 2014
Accepted: 7 April 2014
First Online: 6 June 2014
Competing interests
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.