Takala, Heikki
Björling, Alexander
Berntsson, Oskar
Lehtivuori, Heli
Niebling, Stephan
Hoernke, Maria
Kosheleva, Irina
Henning, Robert
Menzel, Andreas
Ihalainen, Janne A.
Westenhoff, Sebastian
Article History
Received: 23 December 2013
Accepted: 7 April 2014
First Online: 30 April 2014
Competing interests
: The authors declare no competing financial interests.