Funding for this research was provided by:
Uppsala University
Article History
Received: 8 December 2019
Revised: 7 December 2020
Accepted: 9 December 2020
First Online: 10 February 2021
Compliance with Ethical Standards
:
: The study conformed to the Declaration of Helsinki and was approved by the ethics committee at the Faculty of Medicine at the University of Uppsala (Dnr 93/364). Written informed consent was obtained from each participant and bronchial biopsies were taken according to the guidelines of the local ethics committee.
: The authors declare that they have no conflict of interest.
: Not applicable.