Aaltonen, Gisele http://orcid.org/0000-0002-8265-6681
Carpelan-Holmström, Monika
Keränen, Ilona
Lepistö, Anna
Article History
Accepted: 21 February 2018
First Online: 28 February 2018
Compliance with ethical standards
: All procedures performed in this study were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki declaration comparable ethical standards. For this type of study formal consent is not required.
: The authors declare that they have no conflict of interest.