paper : Semiparametric Models for Longitudinal Data with Application to CD4 Cell Numbers in HIV Seroconverters
author : Scott L. Zeger and Peter J. Diggle
Biometrics
Vol. 50, No. 3 (Sep., 1994), pp. 689-699
(article consists of 11 pages)
Published by: International Biometric Society
Stable URL: http://www.jstor.org/stable/2532783