Observational studies: Are they significant in the current evidence-based trial era?

Chandrashekara S, Ramanath N Misra
DOI: 10.15305/ijrci/v1iS1/64


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Chandrashekara S,Misra R. IJRCI. 2013;1(S1):SR1.


observational study, Bias, Random controlled study


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