Following publication of the original article [1], we have been notified that the first and last author names have been swapped.

Originally published names: Mikola Katriina, Rebane Katariina, Kautiainen Hannu and Aalto. Kristiina.

Correct name order: Katriina Mikola, Katariina Rebane, Hannu Kautiainen and Kristiina Aalto.

The original article has been corrected.