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The authors replied as follows:
Chatterjee, Nilanjan, (2007)
Case–Control and Case-Only Designs with Genotype and Family History Data: Estimating Relative Risk, Residual Familial Aggregation, and Cumulative Risk
Chatterjee, Nilanjan, (2006)
Analysis of Survival Data from Case–Control Family Studies
Shih, Joanna H., (2002)