Bartel, Sabine
Schulz, Nikola
Alessandrini, Francesca
Schamberger, Andrea C.
Pagel, Philipp
Theis, Fabian J.
Milger, Katrin
Noessner, Elfriede
Stick, Stephen M.
Kicic, Anthony
Eickelberg, Oliver
Freishtat, Robert J.
Krauss-Etschmann, Susanne
Article History
Received: 22 September 2016
Accepted: 8 March 2017
First Online: 6 April 2017
Competing interests
: The authors declare no competing financial interests.