CHICAGO (Reuters) – Some U.S. states have begun using controversial new breast cancer screening guidelines to stop offering routine mammograms for uninsured women in their 40s, a survey by the Avon Foundation for Women released on Monday found. The Avon survey of more than 150 breast cancer health educators and providers from 48 states and Washington, D.C. found a quarter of the states have either cut or eliminated screening mammography and other early detection services for women under 50. The survey renewed concerns that the guidelines from the U.S. Preventive Services Task Force, which raised the recommended age for women...