library(survival)
fit1=coxph(Surv(time,status) ~rx,data=anderson)
fit2=coxph(Surv(time,status) ~rx+logWBC,data=anderson)
fit3=coxph(Surv(time,status) ~rx*logWBC,data=anderson)
fitlist=list(fit1,fit2,fit3)
modelsSummaryTable(fitlist)
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