Inadvertent duplicate publication: Obstetrics at the London Hospital Medical CollegeBr Med J (Clin Res Ed) 1986; 293 doi: http://dx.doi.org/10.1136/bmj.293.6558.1370-b (Published 22 November 1986) Cite this as: Br Med J (Clin Res Ed) 1986;293:1370
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