David Salkever

Multi-institutional analysis of computed and direct radiography: part II. Economic analysis.

Khan M Siddiqui, Eliot L Siegel, Khan M. Siddiqui, 2005, Radiology.

Estimating Causal Effects in Observational Studies using Electronic Health Data: Challenges and (Some) Solutions

Donald Steinwachs, Elizabeth A. Stuart, E. Stuart, 2013, EGEMS.