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- Microscopy-based techniques, including fluorescence and electron microscopy, have been applied to visualize MP accumulation in placenta and breast milk, raising concerns about maternal and fetal exposure [67]

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However, the variation of where keywords appeared in text, along with ambiguity of language that at times surrounded keywords, may have still led to variations in applying inclusion and exclusion criteria

When these pain relievers are no longer available or become too expensive, the user turns to the much cheaper heroin, which can cost as little as $10 to $15 per stamp bag