41.   But studies of chemicals and hormones that stimulate food intake are providing important clues for developing drugs that may help in appetite control, she said.

42.   But the ads provide no clue to the sponsor of the campaign or the book.

43.   But the hope is that even in these cases, knowledge of the genetic characteristics of the cancer will provide clues for eventually developing treatments.

44.   But the finding could provide important clues for understanding differences in how people age, Coffey said in a telephone interview.

45.   But the recent past may provide clues, at least to the degree of change readers can expect.

46.   But the Center to Prevent Handgun Violence, in Washington, has documented evidence that provides some clues.

47.   But the Goddard team recently found a new method of determining distances to the bursts, hoping this would provide clues to their nature.

48.   But they provide a clue as to how much Russia has changed, and how the Kursk tragedy may change it still more.

49.   But they have not yet retrieved the remains of the cockpit, which may provide more clues.

50.   But the new study may provide some clues.