Funding for this research was provided by:
Helse Sør-Øst RHF (2015058, 2016056)
Text and Data Mining valid from 2018-07-13
Received: 25 September 2017
Accepted: 4 July 2018
First Online: 13 July 2018
Ethics approval and consent to participate
: This study has been performed in accordance with the ExternalRef removed , and approved by the regional ethics committee (Regional committees for medical and health research ethics - South East), Approval no: 2013/169/REK sør-øst D, and Approval no:S-06402b. The patients were given oral and written information prior to inclusion, and signed an informed consent.
: Not applicable.
: No autors have declared competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.