Does standing at work during pregnancy result in reduced infant birth weight?

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      <subfield code="a">The purpose of this study was to investigate the association between physical activities at work, particularly prolonged standing, and infant birth weight among a group of pregnant wormen who were employed in an large petrochemical company in Beijing, China</subfield>
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      <subfield code="t">Journal of occupational health and environmental medicine</subfield>
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      <subfield code="g">Vol. 44, nº 9, september 2002 ; p. 815-821</subfield>
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