Olsson, Maria http://orcid.org/0000-0001-8284-4706
Steineck, Gunnar
Enskär, Karin
Wilderäng, Ulrica
Jarfelt, Marianne
Funding for this research was provided by:
Stiftelsen Samariten
Stiftelsen Assar Gabrielssons Fond
Article History
Received: 12 January 2018
Accepted: 21 February 2018
First Online: 5 March 2018
Compliance with ethical standards
: The Regional Ethical Review Board in Gothenburg, Sweden, granted ethical approval of this study with the reference number 691-13 and additional reference number 944-14. Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflict of interest.