Observational studies: why are they so important?

نویسندگان

  • Alessandro Wasum Mariani
  • Paulo Manuel Pêgo-Fernandes
چکیده

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عنوان ژورنال:
  • Sao Paulo medical journal = Revista paulista de medicina

دوره 132 1  شماره 

صفحات  -

تاریخ انتشار 2014