@article{Platt2004b,
author = {Platt, R.W. and Joseph, K.S. and Ananth, C.C. and Gondines, J. and Abramowicz, M. and Kramer, M.S.},
title= {A Proportional Hazards Model with Time-Dependent Covariates and Time-Varying Effects for Analysis of Fetal and Infant Death},
year = {2004b},
doi = {10.1093/aje/kwh201},
journal = {American Journal of Epidemiology},
volume = {160},
number = {3},
pages = {199--206},
}