61.   Some children who exhibit attention and hyperactivity problems may really be suffering from a sleep disorder, researchers suggest.

62.   Some researchers suggest it could be a waste of money.

63.   Some researchers suggest that several elements historically thought to have originated on Earth actually came from space.

64.   Spanish researchers suggest that these patients may be identified before their stroke progresses with a simple blood test.

65.   So the researchers suggest that a transgenic plant, with this gene sequence inactivated, could produce decaf coffee beans or tea leaves.

66.   Some independent researchers suggested it may be too early to make a conclusive statement about the effects of vouchers.

67.   Some researchers have suggested that the drugs may have led to the health problems that came to be known collectively as gulf war syndrome.

68.   Sugar industry researchers have suggested that the Everglades may be able to stand phosphorus levels more than twice as high.

69.   The adaptation by the insect of the bacterial-produced chemical, the researchers suggest, has wide implications for understanding the roles of gut bacteria in insects.

70.   The ball, the researchers suggest in Nature, protects the weak snake from potential predators like crows.