21.   Still, the combined effects of the herbal potpourri found in many diet supplements have not been studied.

22.   The combined effect of rising unemployment in many industries and lapsed consumer confidence left winds whistling through the empty corridors of department stores.

23.   The combined effect of that selling caused any possible buyers to step away, traders said.

24.   The combined effect of the domestic discontent and the foreign controversies has been significant.

25.   The combined effect of the memos was to leave the impression that if Muglia was to believed, he was either out of touch or naive.

26.   The combined effect of these two shows is quite powerful.

27.   The combined effect on the children is hideous.

28.   The combined effect, he postulated, was an unraveling of the social fabric that holds communities together.

29.   The combined effect of decades of fighting and official neglect have set Afghanistan back decades, if not centuries.

30.   The first was that the combined effect of multiple mutations was greater than the sum of the effects of individual mutations.