Funding for this research was provided by:
Received: 4 September 2018
Accepted: 24 May 2019
First Online: 5 August 2019
Ethics approval and consent to participate
: Participants were treated in accordance with the ethics guidelines of the Swedish Research Council. According to the Regional Ethical Board in Gothenburg, Sweden, a full ethical review was not required for this experimental set-up. All participants read and signed an informed consent form before participating in the study.
: Not applicable.
: The authors declare that they have no competing interests.