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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.