Sulkava, Miska
Raitoharju, Emma
Levula, Mari
Seppälä, Ilkka
Lyytikäinen, Leo-Pekka
Mennander, Ari
Järvinen, Otso
Zeitlin, Rainer
Salenius, Juha-Pekka
Illig, Thomas
Klopp, Norman
Mononen, Nina
Laaksonen, Reijo
Kähönen, Mika
Oksala, Niku
Lehtimäki, Terho
Article History
Received: 20 July 2016
Accepted: 21 December 2016
First Online: 27 January 2017
Competing interests
: The authors declare no competing financial interests.