Bengtsson, Viveca Wallin http://orcid.org/0000-0002-8092-665X
Persson, G. Rutger
Berglund, Johan
Renvert, Stefan
Funding for this research was provided by:
Ministry of Health and Social Affairs
Article History
Received: 16 April 2018
Accepted: 19 June 2018
First Online: 2 July 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in the study, involving human participants, were in accordance with the ethical standards of the regional research ethics committee and with the 1964 Helsinki declaration and its later amendments.
: Informed consent was obtained from all individual participants included in the study.