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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

The “Flat Head” (Chinook) Indians acquired their name through shaping in infancy, as shown in a diag The “Flat Head” (Chinook) Indians acquired their name through shaping in infancy, as shown in a diag
How difficult is it for children to learn to speak two languages? How difficult is it for children to learn to speak two languages?
Listening to the fetal heartbeat with a Doppler device. Listening to the fetal heartbeat with a Doppler device.
The lower intake manifold attaches to the cylinder heads. The lower intake manifold attaches to the cylinder heads.
Passive Reabsorption in the late PCT Passive Reabsorption in the late PCT
Embryonic development of shepherd’s purse (Capsella), a eudicot Embryonic development of shepherd’s purse (Capsella), a eudicot
Video: How to make cDNA Animation

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