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Letters to the editor
Difficult asthma: beyond the guidelines
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Editor,—I write to draw attention to the fact that in his review “Difficult asthma: beyond the guidelines” Balfour-Lynn1 has omitted any reference to one of the most important components. Although he refers to problems of adherence to treatment, this is by no means the only important psychosocial component of difficult asthma. Psychophysiological …