الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Breast cancer is the most common cacer among women, and it is the second leading cause of cancer death in women worldwide. however, the etiology of breast cancer remains largely unkown. risk factors associated with breast cancer can be grouped into four broad determinants: hereditary factors, epigenetics factors,hormenal and reproductive factors, and environmental (including lifestyle) factors.......