Health and Human Services Secretary Kathleen Sebelius says federal policy on who should get breast cancer screening has not changed.A government panel recommended on Monday that most women don't need mammograms in their 40's and should get one every two years starting at 50.That recommendation was a break with the American Cancer Society's long-standing position that women should get screening mammograms starting at age 40.Sebelius says women should ``keep doing what you have been doing for years.''