Hjelmfors, Lisa http://orcid.org/0000-0001-9931-9924
Strömberg, Anna
Friedrichsen, Maria
Sandgren, Anna
Mårtensson, Jan
Jaarsma, Tiny
Article History
Received: 7 May 2018
Accepted: 31 May 2018
First Online: 11 June 2018
Ethics approval and consent to participate
: The study was approved by the Regional Ethical board in Linköping, Dnr. 2013/244–31. The participants were informed about the confidential handling of study data, and written informed consent was obtained from all participants.
: The authors declare that they have no competing interests.
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