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WASHINGTON, July 10 (UPI) -- Online games may promote unhealthy foods but they could also effectively promote healthy foods, U.S. researchers suggest.

HOUSTON, July 10 (UPI) -- Children riding all-terrain vehicles need to be carefully supervised, a U.S. emergency medicine doctor cautioned.

HOUSTON, July 10 (UPI) -- Adults who supervise children or inexperienced swimmers need to know how to swim, a U.S. doctor says.

GRANADA, Spain, July 10 (UPI) -- Sexist jokes favor mental mechanisms linked to violence and battering against women in people with macho attitudes, researchers in Spain said.

BALTIMORE, July 9 (UPI) -- Infants and young children treated with heart drugs get the wrong dose or are victims of errors more often than older children, U.S. researchers found.

CHICAGO, July 9 (UPI) -- Adverse work conditions may be to blame for the decline in number of primary care physicians nationwide, U.S. researchers said.

ADELAIDE, Australia, July 9 (UPI) -- Alzheimer's disease and dementia affect memory and behavior but have different causes and require different treatment, Australian researchers say.

MADISON, Wis., July 9 (UPI) -- A team at the University of Wisconsin said Thursday people can, in theory, avoid diseases of aging and extend their life expectancy with a special diet.

NEW HAVEN, Conn., July 9 (UPI) -- A number of medical research institutions are testing an artificial pancreas on human subjects, a doctor at Connecticut's Yale-New Haven Hospital said Thursday.

SEATTLE, July 9 (UPI) -- Infants who weigh less than 5-and-a-half pounds at birth may have respiratory problems that persist well into adulthood, U.S. researchers said.

ROCHESTER, N.Y., July 9 (UPI) -- Smokestack emissions from oceangoing ships will cause an estimated 87,000 deaths worldwide each year by 2012, U.S. researchers said.

DANVILLE, Va., July 9 (UPI) -- The U.S. Food and Drug Administration cannot find the source of E. coli found in Nestle's cookie dough, FDA officials confirmed Thursday.

SAN FRANCISCO, July 9 (UPI) -- All San Francisco city departments must audit unused land in the city to see if it can be turned into community gardens or farms, the mayor said.

BOSTON, July 9 (UPI) -- Changing the way women take abortion pill RU-486 cut the number of serious infections tied to the drug by more than half, a U.S. study published Thursday said.

ST. LOUIS, July 9 (UPI) -- People want food to be local and they want to know where it comes from and how it is made, a Washington state research firm said.

HOUSTON, July 9 (UPI) -- Those going on a summer vacation would be wise to assemble a medical travel kit to take along, a U.S. physician advises.

BOSTON, July 9 (UPI) -- Pregnant women who consumed seven servings per day of fruits and vegetables moderately reduced risk of upper respiratory infection, U.S. researchers say.

WASHINGTON, July 9 (UPI) -- Too many people die needlessly of heart attacks, heart failure and pneumonia at U.S. hospitals, especially at the worst hospitals, a government analysis said.

MAASTRICHT, Netherlands, July 9 (UPI) -- Dutch researchers advise limiting allergen exposure rather than targeting one trigger to prevent asthma.

SAN FRANCISCO, July 9 (UPI) -- A rapid rise in unemployment can be linked to an increase in suicides, homicides and alcohol abuse, but job programs can mitigate this, U.S. researchers said.