1.   Benzodiazepines differ in how quickly they affect sleep and how long effects last.

2.   Is early weaning a traumatic event whose effects will last for life?

3.   The oil spillage in the Gulf was of such magnitude that its effects will last for Decades.

4.   In such cases, the effects of war lasted only as long as the duration of hostilities, and trade was resumed after the restoration of peace.

5.   The study predicts that the cooling effect will last for between two and four years, by which time the acid will have been dispersed as rain.

6.   This effect lasts for about four weeks!

7.   Among those who improved, the effect has lasted up to three years so far.

8.   And he plans to study how long the suppression effect lasts.

9.   But few psychologists have tested this theory outside the laboratory, or investigated whether the effects of media exposure last over time.

10.   But if their beneficial effect lasts, the AIDS virus can be managed as a chronic disease.