Research Article

Papers that have changed my practice. More than one source of enlightenment.

Br Med J (Clin Res Ed) 1983; 287 doi: http://dx.doi.org/10.1136/bmj.287.6403.1437 (Published 12 November 1983) Cite this as: Br Med J (Clin Res Ed) 1983;287:1437

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