Metsäniitty, Mari http://orcid.org/0000-0001-8437-1607
Waltimo-Sirén, Janna
Ranta, Helena
Fieuws, Steffen
Thevissen, Patrick
Article History
Received: 31 January 2018
Accepted: 23 August 2018
First Online: 1 September 2018
Compliance with ethical standards
: Ethical approval was granted by the Research Ethics Committee of the Hjelt Institute, University of Helsinki (number 02/2010).
: The authors declare that they have no conflicts of interest.