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Breast cancer is the most common cancer among women, excluding nonmelanoma skin cancers.
http://www.cancer.org
Using this, I checked for correlations between female breast cancer mortality rates in the 30 countries for which data was available, and food and environmental factors collected from various other sources.
http://www.vegsource.com
The number of new cases of breast cancer has increased by about one percent per year in the United States since about the 1940s.
http://www.komen.org