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MAP20071503268Does standing at work during pregnancy result in reduced infant birth weight? / Eunhee Ha... [et al.]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, ChinaEn: Journal of occupational health and environmental medicine. - Towson, MD. - Vol. 44, nº 9, september 2002 ; p. 815-8211. Medicina laboral. 2. Gestación. 3. Mujeres. 4. Condiciones de trabajo. 5. Industria petroquímica. 6. Casos prácticos. 7. China. I. Ha, Eunhee. II. Título. III. Título: Journal of occupational and environmental medicine.