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WASHINGTON -- Most of the nearly 800 brands of sunscreen on the U.S. market either fall short of their claims or contain unsafe ingredients, according to an environmental watchdog group here.

UPPSALA, Sweden -- Osteoporotic fracture may be less common among men than women, but a lifetime of physical activity appears to be just as important in reducing this risk, researchers found.

CHICAGO -- Most intracranial arterial aneurysms in children appear to arise spontaneously in the anterior circulation, and not, as commonly believed, as a result of trauma, infections, or vascular malformations, reported investigators here.

WASHINGTON, D.C. -- The odds of getting an NIH grant are a lot better for Ph.D.s and M.D.s who also hold a Ph.D. than for physicians who have a medical degree alone, one study showed.

VIENNA -- Three drugs, two approved and one in the pipeline, are improving care for patients with severe rheumatoid arthritis (RA), according to clinicians here.