学会発表（国際）
Estimation of causal effects using IPTW methods based on time-dependent propensity score for survival data.
Sugihara M, Matsuyama Y, Matsushita Y, and Orihashi Y. Estimation of causal effects using IPTW methods based on time-dependent propensity score for survival data. The 28th annual Conference of the International Society for Clinical Biostatistics (ISCB). 29July-2August 2007, Alexandroupolis, Greece.