| Objective: | To determine the efficacy of screening mammography in asymptomatic women aged 40 to 49 years, and to determine the appropriate screening interval for asymptomatic women aged 50 to 69 years and 40 to 49 years. |
| Search Date: | Trials launched between 1963 and 1983 and meta-analyses published from 1997 to 2000. |
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