TY  - JOUR
A1  - Hu, A.
A1  - Mustillo, S.
T1  - Recent development of propensity score methods in observational studies: Multi-categorical treatment, causal mediation, and heterogeneity
Y1  - 2016
DO  - 10.1177/0011392115589599
VL  - 64
IS  - 1

ER  -