Healthy User and Related Biases in Observational Studies of Preventive Interventions: A Primer for Physicians
Shrank, William H. ; Patrick, Amanda R. ; Alan Brookhart, M.
Journal of general internal medicine : JGIM, 2011-05, Vol.26 (5), p.546-550 [Periódico revisado por pares]New York: Springer-Verlag
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