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Thyroid conditions may make getting pregnant impossible.

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There are 20 feet of blood vessels in each square inch of human skin.

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Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.

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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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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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