1.   Cyclical changes in H pylori infection may cause the variations in basal acid secretion that are seen in duodenal ulcer disease.

2.   As the recent bursting of the dot-com bubble has shown, business is still subject to cyclical change.

3.   Cyclical changes occur because output changes faster than employment.

4.   Nevertheless, chip equipment makers are affected by cyclical changes in chip supply and demand.

5.   You hear the arguments about cyclical change, that the AFC will once again have its day.

6.   Fraser said the currency would continue to respond to fundamental factors such as cyclical changes in commodity prices and interest rate differentials.