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- Time Factors[remove]55
- United States46
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- Pennsylvania8
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- Income5
- Insurance, Health4
- Medical Errors -- prevention & control4
- Retirement -- economics4
- Retirement -- statistics & numerical data4
- Socioeconomic Factors4
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- Aged3
- Catheterization, Central Venous -- adverse effects3
- Communication3
- Decision Making3
- Disabled Persons3