car, R (>= 2.13.0), HH (>= 2.3-27), multcomp (>= 0.991-7),
leaps, lattice, grid, grDevices, latticeExtra
R (>= 3.0.2), HH (>= 2.3-42), lattice, grid, grDevices,
latticeExtra, rgl
R (>= 3.0.2), HH (>= 3.1-13), lattice, grDevices,
latticeExtra, rgl, mgcv