SAN FRANCISCO (EGMN) - Combining genotyping with family history may better identify women at risk of developing breast cancer, a preliminary study of 160 women suggests.Overall, 29% of women had a potentially clinically significant change in estimated risk based on genotyping plus family history, compared with family history alone, Amy Martin and her associates reported at a breast cancer symposium sponsored by the American Society of Clinical Oncology.The investigators calculated genotype relative...