Funding for this research was provided by:
Deutsches Zentrum für Lungenforschung (82DZL00402, 82DZL001A5)
Received: 30 September 2020
Accepted: 7 February 2021
First Online: 17 February 2021
Ethics approval and consent to participate
: The use of patient material was approved by the local ethics council at the University of Lübeck (Ref. 12-220 and Ref. 12-238).
: Not applicable.
: The authors declare that they have no competing interests.