Changes in version 1.1.23                        

    o   new function simData.gh() to generate data from Gumbel-Hougaard copula

                 Changes in version 1.1.15 (2017-05-03)                 

    o   fixed minor issue in prediction function for adjusted copula models

                       Changes in version 1.1.14                        

    o   fixed issue in prediction intervals for mixed Poisson models

                       Changes in version 1.1.13                        

    o   fixed issue in prediction intervals for adjusted copula models

                       Changes in version 1.1.12                        

    o   loocv() now also returns the values of kTau and R2
	estimated in each (N-1) fold

                 Changes in version 1.1.10 (2017-02-27)                 

    o   fixed issues with loocv when few trials (added controls)

    o   added data 'gastadj'

    o   added twoStage parameter to surrosurv for Shih and Louis (1995) approach
	to copula estimation

                        Changes in version 1.1.4                        

    o   added paper manuscript as vignette('surrosurv')

                         Changes in version 1.1                         

    o   Poisson models can be fitted each separately

                        Changes in version 0.1.1                        

    o   fixed examples for poissonize()

                        Changes in version 0.1.0                        

    o   new function loocv() (with print() and plot() functions)
	to compute leave-one-out cross-validation

                       Changes in version 0.0.15                        

    o   new function ste() to compute the surrogate threshold effect

    o   plot.sussosurv() can now show prediction intervals and the STE

                       Changes in version 0.0.11                        

    o   predict and plot for class sussosurv

                       Changes in version 0.0.10                        

    o   kkt2 convergence criteria corrected from positive determinant
	to positive min eigenvalue

                        Changes in version 0.0.9                        

    o   bugfix in Poisson method, which did not return results
	because of mispelled model name

                        Changes in version 0.0.7                        

    o   the Kendall's tau for copulas is now initialized
	using the SurvCorr package (much faster)

                        Changes in version 0.0.6                        

    o   added the function convals(), giving the values of the max abs gradient
	and the min eigenvalue of the variance-covariance matrix of the random treatment effects

    o   the function convergence() uses explicit computation provided by covals(),
	instead of using the function optimx in the package optimx