Funding for this research was provided by:
Received: 27 April 2020
Accepted: 22 June 2020
First Online: 30 June 2020
Ethics approval and consent to participate
: This study is approved by the Regional Ethical Review Board in Lund, Sweden (Reg. No. LU 389–94, 2016/132, 2016/786). It follows the ethical principles for medical research on humans from the declaration of Helsinki [CitationRef removed], as well as the national guidelines on ethical principles [CitationRef removed]. All study participants signed an informed consent before entering the study.
: Not applicable.
: The authors declare that they have no competing interests.