Breathing exercises for asthma: a randomised controlled trial.
Thomas M, McKinley RK, Mellor S, Watkin G, Holloway E, Scullion J, Shaw DE, Wardlaw A, Price D, Pavord I.
Thomas M, et al.
Thorax. 2009 Jan;64(1):55-61. doi: 10.1136/thx.2008.100867. Epub 2008 Dec 3.
Thorax. 2009.
PMID: 19052047
Clinical Trial.