- Correspondence to Dr Edward D Nicol, Royal Air Force Aviation Clinical Medicine Service, RAF Centre of Aviation Medicine, RAF Henlow, Bedfordshire SG16 6DN, UK;
- Received April 12, 2018
- Revised September 27, 2018
- Accepted September 30, 2018
- First published November 13, 2018.
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.