Salminen, Tiina S.
Vesala, Laura
Laiho, Asta
Merisalo, Mikko
Hoikkala, Anneli
Kankare, Maaria
Article History
Received: 27 January 2015
Accepted: 7 May 2015
First Online: 11 June 2015
Competing interests
: The authors declare no competing financial interests.