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...ce that a new version of gsDesign (3.6.0) is now on CRAN (https://cran.r-project.org/package=gsDesign). gsDesign supports group sequential clinical trial design, largely as presented in Jennison and Turnbull (2000). The 3.6.0 update introduces some significant new features and enhancements: - New gsSurvCalendar() function to enable group sequential design for time-to-event outcomes using calendar timing of interim analysis specification. - toInteger() and print.gsSurv() improvements for integer sample size and event count. - toBinomialExact() and gsBinomialExact() now have improved error checking in bound...

...ce that a new version of gsDesign (3.6.0) is now on CRAN (https://cran.r-project.org/package=gsDesign). gsDesign supports group sequential clinical trial design, largely as presented in Jennison and Turnbull (2000). The 3.6.0 update introduces some significant new features and enhancements: - New gsSurvCalendar() function to enable group sequential design for time-to-event outcomes using calendar timing of interim analysis specification. - toInteger() and print.gsSurv() improvements for integer sample size and event count. - toBinomialExact() and gsBinomialExact() now have improved error checking in bound...