Haby, Karin http://orcid.org/0000-0003-2864-3051
Berg, Marie
Gyllensten, Hanna
Hanas, Ragnar
Premberg, Åsa
Article History
Received: 30 June 2017
Accepted: 26 April 2018
First Online: 4 June 2018
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Review Board, Gothenburg, Sweden (Regionala Etikprövningsnämnden i Göteborg). Approval number 505-10. All participants provided written informed consent prior to participating in the project and were informed of the right to withdraw from the study at any time.
: The authors declare that they have no competing interests.
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