R help - Apr 2013 - Confidence Interval Calculation

Hello,
I have the following r-codes for solving a quasilikelihood estimating
equation:
>library(geepack)
>fit<-geese(y~x1+x2+x3,jack=TRUE,scale.fix=TRUE,data=dat,mean.link
"logit", corstr="independence")

Now my question is how can I calculate the confidence interval of the
parameters of the above model "fit"?

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