Local low-dose interleukin-2 induces systemic immunity when combined with radiotherapy of cancer. A pre-clinical study |
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Authors: | LA Everse IB Renes IM Jürgenliemk-Schulz DH Rutgers MR Bernsen HF Dullens W Den Otter JJ Battermann |
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Affiliation: | Department of Anthropology, University of Colorado, Denver, USA. |
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Abstract: | OBJECTIVES: This study examined whether the decline in birth-weight with increasing altitude is due to an independent effect of altitude or an exacerbation of other risk factors. METHODS: Maternal, paternal, and infant characteristics were obtained from 3836 Colorado birth certificates from 1989 through 1991. Average altitude of residence for each county was determined. RESULTS: None of the characteristics related to birthweight (gestational age, maternal weight gain, parity, smoking, prenatal care visits, hypertension, previous small-for-gestational-age infant, female newborn) interacted with the effect of altitude. Birthweight declined an average of 102 g per 3300 ft (1000 m) elevation when the other characteristics were taken into account, increasing the percentage of low birthweight by 54% from the lowest to the highest elevations in Colorado. CONCLUSIONS: High altitude acts independently from other factors to reduce birthweight and accounts for Colorado's high rate of low birthweight. |
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