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Permute survival times after imputation (IPT)
permuteIPT(data, pp, index = TRUE)
matrix as returned by impute.IPT
vector of permuted indices
not used
matrix with time, status, trt columns
Wang, R., Lagakos, S.~W. and Gray, R.~J. Testing and interval estimation for two-sample survival comparisons with small sample sizes and unequal censoring. Biostatistics, 11(4), 676--692, January 2010.