Pulkka, Olli-Pekka
Nilsson, Bengt
Sarlomo-Rikala, Maarit
Reichardt, Peter
Eriksson, Mikael
Hall, Kirsten Sundby
Wardelmann, Eva
Vehtari, Aki
Joensuu, Heikki
Sihto, Harri
Article History
Received: 18 January 2017
Revised: 24 February 2017
Accepted: 3 March 2017
First Online: 23 March 2017
Competing interests
: The authors declare no conflict of interest.