- Correspondence to Professor Wolfram Windisch, Lung Clinic, Kliniken der Stadt Koln gGmbH, Koln 51103, Nordrhein-Westfalen, Germany;
- Received October 6, 2020
- Revised December 8, 2020
- Accepted January 31, 2021
- First published March 2, 2021.
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.