Bergman, J.
Nordström, A.
Nordström, P.
Funding for this research was provided by:
Vetenskapsr?det (2016-02584)
Article History
Received: 28 August 2018
Accepted: 20 December 2018
First Online: 9 January 2019
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. For this type of study formal consent is not required.
: None.