Prospective morbidity surveillance of Shell refinery and petrochimical employees

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      <subfield code="c">Shan P. Tsai... [et al.]</subfield>
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      <subfield code="a">Results for a prospective morbidity study of 14.170 refinery and chemical workers from 1981 through 1988 are presented. The study examined the morbidity patterns for employees by sex, work status, and job group utilising data from the Shell Health Surveillance System</subfield>
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      <subfield code="a">British journal of industrial medicine</subfield>
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      <subfield code="t">British journal of industrial medicine</subfield>
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      <subfield code="g">nº 3, March 1991 ; p. 155-163</subfield>
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