- Correspondence to Dr David Smith, North Bristol Lung Centre, Southmead Hospital, Bristol BS10 5NB, UK;
- Received September 3, 2019
- Revised February 10, 2020
- Accepted February 12, 2020
- First published April 17, 2020.
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.