Correction

Correction: Progestogens and cardiovascular reactions associated with oral contraceptives and a comparison of the safety of 50- and 30-μg oestrogen preparations

Br Med J 1980; 281 doi: https://doi.org/10.1136/bmj.281.6237.422 (Published 09 August 1980) Cite this as: Br Med J 1980;281:422

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