Funding for this research was provided by:
Lungenliga St. Gallen - Appenzell
Kantonsspital Sankt Gallen
Received: 11 July 2020
Accepted: 9 March 2021
First Online: 22 March 2021
: Ethical approval was not required for our retrospective analysis of anonymized data. No written informed consent was given to the patients who were unidentifiable due to the anonymization.
: Not applicable (see above).
: All authors declare they have no competing interests.