Higher levels of the hormone cortisol linked to low birth weight infants, study suggests

Black and low-income patients less likely to undergo genetic testing, research shows

But it's unclear whether the medications or the disease are the key factor; study only showed an association

Whether this increases risk for infection isn't clear

Immediate-release versions of addictive meds such as Oxycontin, Percocet and Vicodin to be affected

People with lighter locks have IQs equal to -- and sometimes higher than -- those with dark or red hair

Factors studied included not smoking, eating right, exercising and keeping a low percentage of body fat

Study found it bested cognitive behavioral therapy and usual care

People with lighter locks have IQs equal to -- and sometimes higher than -- those with dark or red hair

Factors studied included not smoking, eating right, exercising and keeping a low percentage of body fat