Text and Data Mining valid from 2020-01-11
Received: 20 November 2018
Accepted: 27 November 2019
First Online: 11 January 2020
Ethics approval and consent to participate
: All participants receive both written and oral information about the evaluation procedures. A written informed consent is obtained from each participant. The implementation of the study protocol in Sweden has been approved by the Swedish Ethical Review Authority (approval number 2018/313–31/5). In Poland, the Bioethics Committee at Medical University in Poznan, Poland provided a written confirmation that there is no need for an ethical review of the protocol as the study does not involve any experiment (letter dated on 28/03/2018).
: Not applicable.
: The authors declare that they have no competing interests.