- Correspondence to Dr. Thomas S Valley, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, Michigan 48105, USA;
- Received September 17, 2020
- Accepted September 17, 2020
- First published October 6, 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.