Key messages from this Snapshot Summary include:

• Patient-rated measures such as quality of life, medication use, anxiety and exertion tend to improve irrespective of therapeutic modality
• Favourable changes in spirometric measures are usually seen in smaller, lower quality studies
• Lack of validated sham treatment is highlighted in several studies
• Published research on the treatment and management of asthma in adults and children is limited, and is of variable quality

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