Received: 29 August 2018
Accepted: 14 August 2019
First Online: 7 September 2019
Ethics approval and consent to participate
: The Regional Committees for Medical Research Ethics in South East Norway (Rek Sør-Øst B) (ref. no. 2014/1520) approved the project before the trial began. All patients gave their written informed consent. The trial adheres to the principles of the Helsinki Declaration and to the CONSORT guidelines for randomized pilot and feasibility trials.Prior to initiation of this study, the Regional Ethical Review Board in Oslo, Norway, approved the research protocol (2014/1520). The authors certify that they have no affiliations with or financial interest in the subject matter or materials discussed in the article.
: The manuscript does not contain data from any individual person in a form that could be offensive to anyone, but written informed consent for all patients was collected.
: The authors declare that they have no competing interests.