Correspondence

Comparison of response rates to a postal questionnaire from a general practice and a research unit

Br Med J (Clin Res Ed) 1986; 292 doi: https://doi.org/10.1136/bmj.292.6513.140-d (Published 11 January 1986) Cite this as: Br Med J (Clin Res Ed) 1986;292:140

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