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In 1966 a study was reported (Ashley and Davies, 1966a) which showed an association between mor- tality from gastric cancer and 'Welshness', which was defined as membership of the genetic pool of Welsh people and was determined by the two para- meters of Welsh speaking and the possession of a Welsh surname.The present study is an extension of the previous one and includes an attempt to assess the relative risk of death from this neoplasm in the Welsh and non-Welsh people of Wales re- spectively.The standardized mortality ratios (SMR) for gastric cancer were calculated for males and females for the several counties and county boroughs of Wales for the six-year period 1958 to 1963 inclusive
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David J. B. Ashley (1969) studied this question.
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