Hi I have two questions: 1) I would like to know if there is a package in R that constructs a regression tree using the 'goodness-of-split' algorithm for survival analysis proposed by Le Blanc and Crowley (1993) (rather than the usual CART algorithm that uses within-node difference and impurity functions). In other words, is there a tree package based on between-node difference using a two sample test e.g log rank test. 2)If such a package exists, are there user-defined split functions (can we substitute other split functions). Thanks for any help Fiona -- Fiona Callaghan, MS A432 Crabtree Hall Department of Biostatistics Graduate School of Public Health University of Pittsburgh Phone 412 624 3063