HONG KONG (Reuters) - A new diagnostic tool that reduces to two hours the time needed to detect drug-resistant tuberculosis must be made available to populations vulnerable to the disease, a World Health Organization expert said.

HONG KONG (Reuters) - Calcium supplements, which many people consume hoping to ward off osteoporosis, may increase the risk of heart attack by as much as 30 percent, researchers reported Friday.

WASHINGTON (Reuters) - Doctors may be able to watch for kidney injury and protect patients by looking for protein in urine, researchers reported on Thursday.

WASHINGTON (Reuters) - Overweight volunteers who took Orexigen's experimental drug Contrave, designed to reduce cravings, lost about 13 pounds (6 kg) over a year, U.S. researchers reported on Thursday.

NEW YORK (Reuters Health) - San Francisco sends out seven ambulances in response to people thought to be in cardiac or respiratory arrest for every one person that is actually in cardiac arrest, according to a new study of the city's Emergency Medical Dispatch system.