[R] survfit for interval censored data

[Sandra Ellis]

<p>Hello,</p><p>I am a new R-user and would like to use survfit for interval censored data. 
Whenever I try I get an error message that states I can only use survfit for right censored or
counting process data.  I was wondering if anyone knows if there is an additional package available
that can calculate KM curves for interval censored data, or another program with this
capability?</p><p>Thank you.</p><p>S. Ellis (student)</p>