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Impact of the return to school on childhood asthma burden in New York State

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      <subfield code="a">Impact of the return to school on childhood asthma burden in New York State</subfield>
      <subfield code="c">Shao Lin... [et al.]</subfield>
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      <subfield code="t">International journal of occupational and environmental health</subfield>
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      <subfield code="g">03/03/2011 Año 2011 Número 1  - January-March </subfield>
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