Toppinen, M.
Perdomo, M. F.
Palo, J. U.
Simmonds, P.
Lycett, S. J.
Söderlund-Venermo, M.
Sajantila, A.
Hedman, K.
Article History
Received: 6 September 2015
Accepted: 27 October 2015
First Online: 27 November 2015
Competing interests
: The authors declare no competing financial interests.