| http://www.w3.org/ns/prov#value | - ng estrogen therapy alone, without concomitant progesterone.??? The WHI is the largest study ever conducted in women.??? It included a randomized primary-prevention trial of estrogen plus progestin in 16,608 postmenopausal women who were 50 to 79 years old at the beginning of the study.??? Study participants were randomly assigned to receive a placebo or the formulation in the drug Prempro???:???
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