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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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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

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Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Genome sizes among selected groups of eukaryotes Genome sizes among selected groups of eukaryotes
Common Functional Groups Found in Biomolecules Common Functional Groups Found in Biomolecules
Respiratory Rate Ranges of Various Age Groups Respiratory Rate Ranges of Various Age Groups
The main avenue to the upward social mobility reviewed in the text has been higher education. The main avenue to the upward social mobility reviewed in the text has been higher education.
Synthesis of polar head groups of bacterial phospholipids Synthesis of polar head groups of bacterial phospholipids
Evolutionary tree for the living amniote groups Evolutionary tree for the living amniote groups
Video: Protein Secondary and Tertiary Structures - Animation

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