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Subjects
- African Americans1
- Aged2
- Aged, 80 and over1
- Attitude to Computers1
- Blue Cross Blue Shield Insurance Plans1
- Cell Phone -- instrumentation1
- Cell Phone -- trends1
- Cell Phone -- utilization1
- Centers for Disease Control and Prevention (U.S.)1
- Centers for Medicare & Medicaid Services (U.S.)1
- Child Development1
- Child Health Services -- economics1
- Child Health Services -- organization & administration1
- Child Health Services -- trends1
- Child, Preschool1
- Cohort Studies1
- Communication1
- Community Health Services -- economics1
- Community Health Services -- manpower1
- Community Health Services -- trends1