R (>= 2.0.1), boot, geepack, MASS, nlme, nnet, survival
R (>= 2.0.0), boot, geepack, MASS, nlme, nnet, survey,
survival
R (>= 2.0.0), boot, geepack, MASS, nlme, nnet, survival
MASS, nnet, survival, geepack, graphics, methods, stats