1.
Botha P, Steyn D, Richter D. Time to spirometric and exercise response in 4-week oral corticosteroid trial for stable COPD patients. Swiss Med Wkly [Internet]. 2005 Sep. 24 [cited 2024 May 17];135(3738):562-. Available from: https://smw.ch/index.php/smw/article/view/534