Effect of PIFR-based optimised inhalation therapy in patients recovering from acute exacerbation of chronic obstructive pulmonary disease: protocol of a prospective, multicentre, superiority, randomised controlled trial
- Resource Type
- Journal
- Source
BMJ OPEN ; 2020, 10 5, pe034804 8p.- Subject
- Language
- English
- ISSN
- 20446055