Tikkanen, R
Tiihonen, J
Rautiainen, M R
Paunio, T
Bevilacqua, L
Panarsky, R
Goldman, D
Virkkunen, M
Article History
Received: 9 June 2015
Revised: 18 September 2015
Accepted: 19 September 2015
First Online: 17 November 2015
Competing interests
: The authors declare no conflict of interest.