TY - JOUR A1 - Curtis, L.H. A1 - Hammill, B.G. A1 - Eisenstein, E.L. A1 - Kramer, J.M. A1 - Anstrom, K.J. T1 - Using inverse probability-weighted estimators in comparative effectiveness analyses with observational databases Y1 - 2007 DO - 10.1097/MLR.0b013e31806518ac VL - 45 IS - 10 ER -