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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

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Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

A coronary artery bypass graft (CABG) is a procedure to bypass a blocked coronary artery. The proced A coronary artery bypass graft (CABG) is a procedure to bypass a blocked coronary artery. The proced
Firing Rate of Individual SCN Neurons in a Tissue Culture Color bars have been added to emphasize th Firing Rate of Individual SCN Neurons in a Tissue Culture Color bars have been added to emphasize th
The IAT procedure The IAT procedure
The prefrontal lobotomy procedure developed by Moniz and Lima. The prefrontal lobotomy procedure developed by Moniz and Lima.
Mammograms. (A) Mammogram procedure. (B) Film of normal breast. (C) Film of breast with tumor. Mammograms. (A) Mammogram procedure. (B) Film of normal breast. (C) Film of breast with tumor.
Alphabet writing for junior kindergarten Alphabet writing for junior kindergarten
Video: Hydrogen bonds - role in the body

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