Very high and very low levels of physical activity can both accelerate the degeneration of knee cartilage in middle-aged adults, according to a new study by UCSF researchers.
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August 09, 2012
Sjögren's syndrome largely was unknown to the American public until tennis star Venus Williams withdrew from the U.S. Open last year and announced she had the autoimmune disease, in which a person’s white blood cells attack glands that produce tears and saliva.
