CD4 cell counts for 366 subjects between months -18 and 42 since
seroconversion. Each subject's observations are contained in a single row.
Arguments
Format
A data frame made up of a 366 x 61 matrix of CD4 cell counts
References
Goldsmith, J., Greven, S., and Crainiceanu, C. (2013).
Corrected confidence bands for functional data using principal components.
Biometrics, 69(1), 41--51.