Levnajić, Zoran
Pikovsky, Arkady
Article History
Received: 28 October 2013
Accepted: 2 May 2014
First Online: 22 May 2014
Change Date: 25 June 2014
Change Type: Update
Change Details: A correction has been published and is appended to both the HTML and PDF versions of this paper. The error has been fixed in the paper.
Competing interests
: The authors declare no competing financial interests.