CD4: The data were given by Wade and Ades (1994) and refer to cd4 counts from uninfected children born to HIV-1 mothers and the age of the child.
Data frames each with the following variable.
a numeric vector showing the CD4 counts
the age of the child
Data sets usefull for the GAMLSS booklet
Wade, A. M. and Ader, A. E. (1994) Age-related reference ranges : Significance tests for models and confidence intervals for centiles. Statistics in Medicine, 13, pages 2359-2367.