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Author Question: During the height of the last ice age, approximately 18,000 years ago, sea level (Read 34 times) |
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Thyroid conditions may make getting pregnant impossible.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.