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The familiar sounds of your heart are made by the heart's valves as they open and close.
People about to have surgery must tell their health care providers about all supplements they take.
More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.