Tiippana, Kaisa http://orcid.org/0000-0002-2305-8104
Salmela, Viljami R.
Article History
Received: 6 July 2017
Accepted: 22 February 2018
First Online: 26 February 2018
Compliance with ethical standards
:
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The authors declare that they have no conflict of interest.