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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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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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There are 20 feet of blood vessels in each square inch of human skin.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.