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"Estrogen plus progestin increased the risk of breast cancer in postmenopausal women taking hormone therapy, U.S. researchers found."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Health_News/2012/03/20/Estrogen-plus-progestin-may-up-cancer-risk/UPI-47311332266239/?rel=99881338224133>