Observational studies: why are they so important?
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| Main Authors: | , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Associação Paulista de Medicina - APM
2014
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| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-31802014000100001 |
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