Valkama, A
Koivusalo, S
Lindström, J
Meinilä, J
Kautiainen, H
Stach-Lempinen, B
Rönö, K
Klemetti, M
Pöyhönen-Alho, M
Tiitinen, A
Huvinen, E
Laivuori, H
Andersson, S
Roine, R
Eriksson, J G
Article History
Received: 2 June 2015
Revised: 9 October 2015
Accepted: 18 October 2015
First Online: 16 December 2015
Competing interests
: The authors declare no conflict of interest.