THE GOOD NEWS
-- The cause of Alzheimer's disease is still unknown, but new research points to excess zinc as a possible explanation for physical changes found in victims' brains.
-- A new blood test can tell whether patients with chest pain but a normal electrocardiogram are in fact having a heart attack; such people usually go into intensive care as a precaution, but over 70% don't belong there.
-- About 10% of those who get melanoma, the skin cancer that kills some 7,000 Americans each year, have an inherited weakness for the disease. Now the guilty gene has been found;...
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