Text and Data Mining valid from 2019-08-24
Received: 11 April 2019
Accepted: 16 August 2019
First Online: 24 August 2019
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Review Board of Linköping, Sweden (Dnr, 131-31). All participants consented to attend the study by answering the questionnaire.
: All authors have given their consent for publication.
: The authors declare that they have no competing interests.