- Correspondence to Dr Daniel K Kornhall, The Air Ambulance Division of Emergency Medical Services, University Hospital of North Norway, 9038 Tromsø Norway;
- Received 23 March 2015
- Revision received 31 May 2015
- Accepted 1 June 2015
- Published in print 1 December 2016.
- Published online 28 November 2016.
- Published first 19 June 2015.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.