Results 171 to 180 of about 1,669,402 (199)
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Randomized, Controlled Trials, Observational Studies, and the Hierarchy of Research Designs
New England Journal of Medicine, 2000John Concato, Ralph I Horwitz
exaly
Advances in Colloidal Assembly: The Design of Structure and Hierarchy in Two and Three Dimensions
Chemical Reviews, 2015Nicolas Vogel +2 more
exaly

