Suikkola, Jari
Björninen, Toni
Mosallaei, Mahmoud
Kankkunen, Timo
Iso-Ketola, Pekka
Ukkonen, Leena
Vanhala, Jukka
Mäntysalo, Matti
Article History
Received: 21 December 2015
Accepted: 22 April 2016
First Online: 13 May 2016
Competing interests
: The authors declare no competing financial interests.