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CALGARY, Alberta -- A pregnancy hormone may offer a key to halting or reversing the progression of multiple sclerosis and other demyelinating diseases, researchers here reported.

LONDON -- Treating herpes simplex with valacylovir (Valtrex) reduces the levels of HIV in women who are infected with both viruses, according to researchers here.

ROCKVILLE, Md. -- The FDA informed physicians today of a report by GlaxoSmithKline of an increased number of arm, hand, and foot fractures among women taking rosiglitazone (Avandia) for newly diagnosed type 2 diabetes.

ORLANDO -- A bolus of highly concentrated saline can reverse transtentorial brain herniation in about 75% of cases, a Johns Hopkins researcher said here.

WHITE RIVER JUNCTION, Vt. -- A slim primer that helps patients weigh the subtleties of medical claims and the consequences of treatment decisions appears to have survived the rigors of a randomized controlled study.

UTRECHT, The Netherlands -- In low-risk patients undergoing CABG surgery, spurning the cardiopulmonary bypass pump had no effect on five-year cognitive or cardiac outcomes, according to Dutch researchers.

CHICAGO -- Survivors of childhood cancers have a nine-fold higher risk of developing secondary sarcomas more than a decade after their original diagnosis, reported investigators here.

ORLANDO -- About a third of all children treated in a pediatric intensive care unit will develop some of the symptoms of post-traumatic stress disorder, including hallucinations and nightmares, investigators reported here.

HAMILTON, Ontario -- Genes associated with an autism risk appear to be clustered in a region on chromosome 11, according to the largest study yet of families with a predisposition to the condition.

ORLANDO -- In critically ill trauma patients, recombinant epoetin alfa reduces mortality by 48%, according to the most recent in a series of studies of the cytokine.

PARIS -- Women have a higher mortality rate than men after a heart attack largely because they are older and sicker when these events occur, according to investigators here.

GLASGOW, Scotland, Feb. 19 -- There's more evidence women can benefit from moderate exercise during early treatment for breast cancer, researchers here said.

BETHESDA, Md. -- Higher maternal fish consumption during pregnancy improves a child's neurological development, researchers here reported.

LAHTI, Finland -- Continuous hydrocortisone infusions for septic shock in the ICU may yield fewer hyperglycemia episodes and less work for nurses compared with bolus infusions, researchers here said.

JACKSONVILLE, Fla. -- A way to reduce the dangerous accumulation of tau protein tangles in the brain that is characteristic of Alzheimer's disease has been reported by researchers studying mice here.

ATLANTA -- In West Virginia, every 10th adult has had a heart attack or suffers from coronary artery disease, with or without symptoms of angina, according to a CDC survey. No state has a worse record.

ROCKVILLE, Md. -- The FDA said today it has had reports of Americans needing emergency medical treatment after taking what's been identified as the antipsychotic drug haloperidol sent by shady Internet sites instead of the drugs that were ordered.

VANCOUVER, British Columbia -- Nearly half of all patients with a benign course of multiple sclerosis in "permanent arrest" for 10 years eventually had disease progression, found researchers here.