11.   The combo became wildly popular, particular in supervised weight loss centers, until research linked it to heart damage.

12.   Other research has linked asthma with heart trouble, but those studies did not clearly distinguish the effect of smoking, which contributes to both asthma and cardiovascular disease.

13.   Other research has linked the hormone therapy to a slight increase in the risk of breast cancer.

14.   But Visser said previous research has linked elevated CRP levels in overweight adults with the development of heart problems.

15.   Recent research has linked soft drinks with childhood obesity.

16.   Previous research also has linked it with behavioral problems in children.

17.   Research has linked consumption of beef from BSE-infected cattle to the Creutzfeld-Jakob brain disease in humans.

18.   Research has linked consumption of beef from BSE-infected cattle to the fatal Creutzfeld-Jakob brain disease in humans.

19.   Research has linked BSE with the deadly Creutzfeld-Jakob brain disease in humans.

20.   While previous research has linked exposure to media violence with increased aggression, few potential solutions have been evaluated, the authors said.