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The familiar sounds of your heart are made by the heart's valves as they open and close.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.
Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.