Aabel, Peder
Utheim, Tor Paaske
Olstad, Ole Kristoffer
Rask-Andersen, Helge
Dilley, Rodney James
von Unge, Magnus
Funding for this research was provided by:
University of Oslo
Akershus University Hospital
The South-Eastern Norway Regional Health Authority
Article History
Received: 8 June 2017
Accepted: 19 February 2018
First Online: 5 April 2018
Compliance with Ethical Standards
: The study was performed according to the Declaration of Helsinki and was approved by the South-Eastern Norway Regional Committee for Medical Research Ethics (2010/1345).
: The authors declare that they have no conflict of interest.