DOI:
10.1055/s-00028832
Arquivos Brasileiros de Neurocirurgia: Brazilian Neurosurgery
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References
Newgard CD, Hedges JR, Arthur M, Mullins RJ.
Advanced statistics: the propensity score--a method for estimating treatment effect in observational research.
Acad Emerg Med 2004;
11 (09) 953-961
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