81.   But Kalpers said this was unlikely since the wardens and the researchers had been absent for a relatively short period.

82.   But many researchers had been skeptical of those claims.

83.   But now, researchers are worried that international cooperation will suffer even greater setbacks as Congress reacts to reports of alleged nuclear spying by China.

84.   But not even the researchers themselves are ready to stir hopes of a cure just yet.

85.   But other researchers are unconvinced.

86.   But on the whole the researchers are delighted to be left to their own devices, with generous equipment budgets and far from meddling middle managers.

87.   But researchers are confident they can do it.

88.   But researchers are optimistic.

89.   But researchers have long been puzzled about why.

90.   But researchers said that women who have taken the drugs should not be unduly alarmed because researchers are uncertain what the findings mean.