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The authors replied as follows:
Chatterjee, Nilanjan, (2007)
On Use of Bivariate Survival Models with Cure Fraction
Chatterjee, Nilanjan, (2003)
Case–Control and Case-Only Designs with Genotype and Family History Data: Estimating Relative Risk, Residual Familial Aggregation, and Cumulative Risk
Chatterjee, Nilanjan, (2006)