Referencia:
Gabriel SE, Normand SL. Getting the methods right - the Foundation of Patient-Centered Outcomes Research. New England Journal of Medicine 2012;367(9):787-90. [PubMed: 22830434]
Gabriel SE, Normand SL. Getting the methods right - the Foundation of Patient-Centered Outcomes Research. New England Journal of Medicine 2012;367(9):787-90. [PubMed: 22830434]
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