Example sentences of "have been [vb pp] [prep] some studies " in BNC.

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1 The counting of published papers is a crude method of measuring the productivity of research workers , but it has been used in some studies , such as that carried out by Vlachy 232 .
2 The ideal osmotic control for ethanol is distilled water and not hypertonic glucose or saline as has been used in some studies .
3 One type of ‘ natural ’ matching has been used in some studies of identical ( I ) ( about 1 in 5 ) and non-identical ( N ) twins .
4 Supplementary dietary calcium has been shown in some studies to reduce colonic cell proliferation in man .
5 In fact , a relationship between visual laterality effects and eye dominance has been found in some studies ( Hayashi and Bryden , 1967 ; Zurif and Bryden , 1969 ; Bryden , 1973 ) .
6 This superiority in the visuo-spatial domain has been found in some studies to extend to perception of the third dimension .
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