Ylikallio, Emil
Kim, Doyoun
Isohanni, Pirjo
Auranen, Mari
Kim, Eunjoon
Lönnqvist, Tuula
Tyynismaa, Henna
Article History
Received: 12 September 2014
Revised: 5 December 2014
Accepted: 17 December 2014
First Online: 14 January 2015
Competing interests
: The authors declare no conflict of interest.