Matched sampling is a standard technique for controlling bias in observational studies due to specific covariates. Since Rosenbaum & Rubin (1983), multivariate matching methods based on estimated ...
This is a preview. Log in through your library . Abstract Cluster randomization trials with relatively few clusters have been widely used in recent years for evaluation of health-care strategies. On ...
Patients with resected CCA undergoing curative surgery, with or without AC, were identified from three centers in Thailand. Patients with R2 resection and 30 days postoperative death were excluded.
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