11.   Since the animals were not exposed to marijuana smoke, the study did not address the carcinogenic potential of inhaled marijuana.

12.   The new study addresses the first of these concerns.

13.   The new study did not address the safety of occupants of sport utility vehicles.

14.   The study does not address the safety of imported foods.

15.   The studies did not address the issues of differences in blood pressure among racial or ethnic groups.

16.   The study did not address the question of taking estrogen supplements after menopause.

17.   The study did not address what the children of nonworking parents ate.

18.   The study did not address such questions as how long the narrowing lasts, whether it becomes permanent after long-term cocaine use or when brain damage might occur.

19.   The study did not address the effects on driving of dialing cell phones.

20.   The study did not address what effect the acquisition of a stable apartment had on helping the families resolve their personal problems.