Letter: Breathe in...

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The Independent Online
Hyperventilation not only affects asthmatics but in its chronic form is the main channel through which fears and anxieties are transformed into bodily symptoms ("Hyperventilation...", Real Life, 5 October). Dr Lum's breathing control exercises produce excellent results, and I have successfully treated many patients with them over the past 15 years. A useful book for lay-people is The Hyperventilation Syndrome by Dinah Bradley.

Dr JB Wilkinson

London W1