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pubmed:abstractText |
Physical activity has many health benefits. Although greater activity has been related to lower postmenopausal breast cancer risk, important details remain unclear, including type, intensity, and timing of activity and whether the association varies by subgroups.
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pubmed:affiliation |
Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA. heather.eliassen@channing.harvard.edu
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