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BMJ 2004; 328 doi: https://doi.org/10.1136/bmj.328.7439.540 (Published 04 March 2004) Cite this as: BMJ 2004;328:540

NIH closes oestrogen-only arm of HRT trial: The US National Institutes of Health (NIH) has instructed the 11 000 participants in the oestrogen-alone study of the women's health initiative (WHI), a large multicentre trial, to stop taking their study pills because after seven years of the trial the hormone does not seem to affect heart disease and increases the risk …

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