Study design, precision, and validity in observational studies
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Published in | Journal of palliative medicine Vol. 12; no. 1; p. 77 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
United States
01.01.2009
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Subjects | |
Online Access | Get more information |
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ISSN: | 1557-7740 |
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DOI: | 10.1089/jpm.2008.9690 |