Correspondence

Points: Efficacy of electrostatic precipitators and air ionisation devices

Br Med J (Clin Res Ed) 1983; 286 doi: https://doi.org/10.1136/bmj.286.6359.150-h (Published 08 January 1983) Cite this as: Br Med J (Clin Res Ed) 1983;286:150

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