- Correspondence to Magnus Hilland, Department of Otolaryngology & Head and Neck Surgery, Haukeland University Hospital, Haukelandsveien 22, Bergen 5021, Norway;
- Received February 19, 2015
- Revised December 22, 2015
- Accepted January 15, 2016
- First published February 23, 2016.
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.