21.   The U.S. government concern was triggered by two industry-sponsored studies that the FDA said required additional research.

22.   This would require research into pinpoint tracking and pointing methods as well as high-efficiency, low-power lasers.

23.   Verifying that will require more research, she said.

24.   While current scientific research suggests that Iraqi chemical or biological agents are not responsible for the ailments, it said, the question requires additional research.

25.   While the matter may require more research, our instinct is that Marlboro and the other communities are on the right track.

26.   With its intricate scenes and finely drawn and incomplete figures, they said in their open letter to Italian cultural officials, this painting requires special research.

27.   But that would require extensive research on human embryos and fetuses.

28.   Officials may turn down applications which unreasonably divert resources or require research.

29.   The study did not examine what treatments patients received or how they fared afterward, both areas that doctors say require more research.

30.   He cautioned, however, that the efficiency of his technique requires more research.