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Funding for this research was provided by:
Umea University
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Article History
Accepted: 25 July 2019
First Online: 7 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Regional Ethics Committee at Umeå University, Sweden (DNR 07-081M) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
