Ihalainen, T http://orcid.org/0000-0001-6778-061X
Rinta-Kiikka, I
Luoto, T M
Koskinen, E A
Korpijaakko-Huuhka, A-M
Ronkainen, A
Article History
Received: 13 March 2017
Revised: 16 May 2017
Accepted: 19 May 2017
First Online: 20 June 2017
Competing interests
: The authors declare no conflict of interest.