The familiar sounds of your heart are made by the heart's valves as they open and close.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.
Stethoscope with both a bell and flat disc amplifier.
Close-up view of a diaphragm amplifier on the left and a bell amplifier on the right
Stethoscope with both a bell-shaped and flat-disc amplifier
Close-up of a flat-disc amplifier (left) and a bell amplifier (right)