Funding for this research was provided by:
Knowledge Foundation (KKS), Sweden (20120275)
Article History
First Online: 17 August 2018
Compliance with Ethical Standards
:
: This study complies with the laws in Sweden, where it was performed. The study was approved by an ethical board in Sweden and was performed in accordance with the 1964 Helsinki Declaration. All participants in this study gave informed consent to participate, and the results were presented in an unidentifiable manner.
: The authors declare that they have no conflict of interest.