Trial of cromoglycate and slow-release aminophylline in perennial childhood asthmaBr Med J (Clin Res Ed) 1981; 283 doi: https://doi.org/10.1136/bmj.283.6285.231-c (Published 18 July 1981) Cite this as: Br Med J (Clin Res Ed) 1981;283:231
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