Duke study finds genetic variation impacts those with heart disease

Study found 29 percent higher odds of mental decline compared to women with healthy hearts

Study found that they made fewer slight errors than healthy patients and those using meds

Drug relaxes lung airways

Drug relaxes lung airways

Medication combines two bronchodilators, experts say

It may have its roots in immune system problems, study suggests

But whether extra weight actually causes stress isn't clear, researcher says

Expert panel says treating some earlier with drugs shows little benefit, but other groups express concern

Study looked at blood-testing methods to detect changes before symptoms begin