| 31. | The momentum behind cluster studies caught other health officials off guard.
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| 32. | Another problem is how to draw the boundaries of a cluster.
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| 33. | Experts contend it's become crucial to cluster like this.
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| 34. | Eye movements were used to trigger the desired cluster of letters.
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| 35. | Clusters of houses perched on steep hillsides, waiting for disaster.
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| 36. | Thinning blondish hair was down to a cluster of unruly stalks.
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| 37. | Clusters of gulls were wheeling over the center of the pond.
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| 38. | Eleven were from the Yugoslavia cluster and three were from Turkey.
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| 39. | An estimated 40 percent have been the victims of cluster bombs.
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| 40. | Hut thought the same concept could be applied to star clusters.
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