Wangdell, J.
Fridén, J.
Article History
Received: 30 August 2017
Revised: 16 March 2018
Accepted: 3 April 2018
First Online: 14 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: We certify that all applicable institutional and governmental regulations concerning the ethical use of human volunteers were followed during the course of this research. Ethical approval was obtained from the Ethic Committee, Gothenburg, Sweden. Number 550-16.