Funding for this research was provided by:
National Heart and Lung Institute
Received: 4 September 2020
Accepted: 7 December 2020
First Online: 18 January 2021
Ethics approval and consent to participate
: This study involved analysis of pre-existing, de-identified data. In accordance with the Health Insurance Portability and Accountability Act, it was exempt from Institutional Review Board approval.
: Not applicable.
: CG and RZ have no conflict of interest. Prof. Quint’s research group has received funds from AZ, GSK, The Health Foundation, MRC, British Lung Foundation, IQVIA, Chiesi, and Asthma UK outside the submitted work, and grants and personal fees from GlaxoSmithKline, Boehringer Ingelheim, AstraZeneca, Bayer, and Insmed outside the submitted work.