Guidelines for management of asthma in adults: I--Chronic persistent asthma. Statement by the British Thoracic Society, Research Unit of the Royal College of Physicians of London, King's Fund Centre, National Asthma Campaign.British Medical Journal 1990; 301 doi: https://doi.org/10.1136/bmj.301.6753.651 (Published 29 September 1990) Cite this as: British Medical Journal 1990;301:651
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