1.   A number of inherited characteristics, such as blood groups and HLA antigens, have been studied to determine the degree of association with peptic ulceration.

2.   Larger numbers of subjects need to be studied to determine the significance of these preliminary findings.

3.   For two weeks the subjects were studied to determine exactly how many calories a day they needed to maintain their regular weight.

4.   In the addictive behaviors section, alcoholism and the abuse of legal and illegal substances will be studied to determine how the brain is changed by these mind-altering compounds.

5.   They are also being studied to determine whether they can ward off the disease in people at high risk for it.

6.   This new type of ride has been studied to determine whether there is a link between G-force and brain injuries.

7.   A bone sample is being analyzed using carbon-dating techniques at Oxford University and a tooth is being studied to determine where the man was born.

8.   A U.S. embassy official said the threat would be studied to determine how serious it was.

9.   Christopher said such moves were being studied to determine whether Washington should join other Asian nations in improving relations with Burma.