Funding for this research was provided by:
Högskolan i Halmstad
Received: 15 June 2020
Accepted: 4 February 2021
First Online: 12 February 2021
Ethics approval and consent to participate
: This study was approved by the Regional Ethical Review board in Sweden, (dnr 2010/579). It follows the ethical principles for medical research on humans from the declaration of Helsinki, as well as the national guidelines on ethical principles. All study participants signed an informed consent before entering the study.
: Informed consent was obtained from all individual participants included in the study.
: The authors declare that they have no conflict of interest.