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Variance estimation for stratified propensity score estimators

Pubmed ID: 
22362427
Year: 
2012
Month: 
JUL
Volume: 
31
Issue: 
15
Citation: 
Williamson EJ, Morley R, Lucas A, Carpenter JR. Variance estimation for stratified propensity score estimators. Statistics in Medicine 31 (15) : 1617 - 1632(2012) PubMed