Sinikumpu, Suvi-Päivikki
Auvinen, Juha
Jokelainen, Jari
Huilaja, Laura
Puukka, Katri
Ruokonen, Aimo
Keinänen-Kiukaanniemi, Sirkka
Tasanen, Kaisa
Timonen, Markku
Article History
Received: 13 February 2017
Accepted: 26 July 2017
First Online: 22 August 2017
Competing Interests
: The authors declare that they have no competing interests.