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In addition, several other studies have been performed to assess the validity of birth certificate data for effect estimation [22, 37] and the results suggest that birth certificate data may be useful for exploratory studies assessing the association between birth congenital anomalies and some risk factors

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Persistent smells, discoloration on walls or ceilings, or allergy flare-ups are signs that smoke particles have embedded themselves deep in surfaces, something basic cleaning often cant solve