The use of Gaussian quadrature in frailty proportional hazards models. Statistics in Medicine 27, 2665-2683
This directory include the code and sample data in the paper by Liu and Huang (2008): The use of Gaussian quadrature in frailty proportional hazards models." The R codes are used to generate data, which are fitted in SAS code.
Example a.sas, example b.sas, and example c.sas are sample SAS code in Sections 4 and 5.