1.   Further studies comparing the bile acid absorption in polyp patients with that in patients with established colorectal cancer, may help to clarify this issue.

2.   The higher fibre diet fed to the rats could be regarded as their normal fibre intake and thus this study compared normal fibre intake with low fibre intake.

3.   This study compares the incidence rates of histologically confirmed gastric carcinoma in Oxfordshire in two five year periods.

4.   Among other controls, the study compared salaries for full-time employees only.

5.   A recent Australian study compared benefits of altitude-house use with EPO-use and found that the altitude-house effect was significantly lower.

6.   But in an interview, Camargo said many past studies have compared healthy people who drink with unhealthy people who do not, exaggerating the apparent benefits of alcohol.

7.   But the new study compared melatonin with placebo pills in a group of subjects.

8.   For example, Barbaro said, the French study did not compare the effectiveness of low and high doses of radiation, as the American study will.

9.   One study compared the practice to drunken driving.