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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

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