Researchers of the heart and headaches at Thomas Jefferson University Hospital are combining efforts to determine if a common heart defect may be the cause of some forms of migraine headaches.

Scientists' inability to follow the whereabouts of cells injected into the human body has long been a major drawback in developing effective medical therapies. Now, researchers at Johns Hopkins have developed a promising new technique for noninvasively tracking where living cells go after they are put into the body.