E >> MEDICINE >> NEWSEthnic Variations in Hormone Levels May Cause Differences in Breast Cancer RiskResearchers have known that a woman???s natural hormone levels can affec...Using data from the Multiethnic Cohort Study V. Wendy Setiawan P...???We had observed that some groups such as native Hawaiians have h...The researchers also found that Japanese-American women have compa...Latinas had similar