An%20Introductory%20Lecture%20to%20Environmental%20Epidemiology%20Part%205.%20Ecological%20Studies. - PowerPoint PPT Presentation

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An%20Introductory%20Lecture%20to%20Environmental%20Epidemiology%20Part%205.%20Ecological%20Studies.

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... mother, sex, birth weight, gestational age of baby, and ... geographic region of residence as a surrogate for exposure to biogas in the ambient air ... – PowerPoint PPT presentation

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