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Different analyses estimate different parameters of the effect of erythropoietin stimulating agents on survival in end stage renal disease: a comparison of payment policy analysis, instrumental variables, and multiple imputation of potential outcomes.
Dore DD, Swaminathan S, Gutman R, Trivedi AN, Mor V. Dore DD, et al. J Clin Epidemiol. 2013 Aug;66(8 Suppl):S42-50. doi: 10.1016/j.jclinepi.2013.02.014. J Clin Epidemiol. 2013. PMID: 23849152 Free PMC article.