Example sentences of "study have shown a " in BNC.

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1 The present study has shown a cytoplasmic anti-neutrophil antibody , which seems to be more specific than our previously described nuclear anti-neutrophil antibody .
2 One major prospective study has shown a direct relation in men between serum cholesterl and the incidence of rectal carcinoma alone .
3 This study has shown a high prevalence of H pylori infection in the parents of children who are H pylori positive .
4 This study has shown a larger proportion of electrocardiographic changes ( 91% ) than previous studies , even though some of these included sinus tachycardia as an arrhythmia .
5 Another study has shown a positive association between gastric cancer and exposure to coal dust in those miners who smoked .
6 Stone recurrences in five patients are believed to be the result of residual stones as they reformed by the six month follow up examination and each of the post procedure contrast studies had shown a filling defect in the neck of the gall bladder or cystic duct .
7 Acupuncture : ‘ Claims … are not based on the results of well performed clinical trials although some studies have shown a small but temporary improvement in wheeziness . ’
8 Many studies have shown a relationship between serum cholesterol levels and ischaemic heart disease ( Keys , 1970 ; Kannel et al , 1971 ; Wilhelmsen et al , 1973 ; Rosenman et al , 1976 ; Kannel et al , 1979 ) , and this relationship holds even within the normal range of serum cholesterol concentration .
9 Certainly studies have shown a remarkable correlation between ingestion of fluoride and a drop in tooth decay among children — up to 60% .
10 Tachistoscopic studies have shown a right visual hemifield superiority in recognition of Katakana and a left hemifield advantage for Kanji ( Hatta , 1976 ; 1977 ; Saganuma , Itoh , Mori and Kobayashi , 1977 ; Endo , Shimizu and Hori , 1978 ) .
11 Thus in vitro studies have shown a defect in the terminal ileal bile acid active transport mechanisms in patients with cystic fibrosis , which if present in vivo , would also contribute to excessive faecal bile acid loss .
12 Animal studies have shown a correlation between the bastric mucosal injury induced by ethanol or acid and increased synthesis of leukotrienes .
13 Previous studies have shown a remarkable morphological and behavioural similarity to duodenal ulcer in man .
14 Although studies have shown a striking correlation between the presence of H pylori and classic inflammation of the antral mucosa , the exact mechanism of tissue injury remains obscure .
15 Several studies have shown a close association between liver inflammatory activities and membrane associated pre-S1 or pre-S2 in chronic hepatitis B virus infection , suggesting that membranous pre-S1 or pre-S2 might be a possible target antigen in T-cell mediated lysis of hepatocytes .
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