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fDesc[0] = "Power and Sample Size for Group Sequential Trials. The main features of this product are: Power and Sample Size calculations for Two Means test, Two Proportions test and Log Rank test.<br /> Choice of four alpha spending functions, O&rsquo;Brien-Fleming, Pocock, Hwang-Shih-DeCani and Power as well as option to manually specify boundaries. Plots of boundary values. Plots of power vs sample size. Output statement detailing the parameters involved in the trial.<br /> Detailed analysis of alpha spending and power at each interim &lsquo;look&rsquo;. Easy to use spreadsheet style interface. Interactive Help and input advice. Customizable screen layout and configuration.";

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