Poepsel, Simon
Sprengel, Andreas
Sacca, Barbara
Kaschani, Farnusch
Kaiser, Markus
Gatsogiannis, Christos
Raunser, Stefan
Clausen, Tim
Ehrmann, Michael
Article History
Received: 17 February 2015
Accepted: 9 September 2015
First Online: 5 October 2015
Competing interests
: The authors declare no competing financial interests.