@article {wu_nonlinear_2004,
	title = {Nonlinear mixed-effect models with nonignorably missing covariates},
	journal = {Canadian Journal of Statistics},
	volume = {32},
	number = {1},
	year = {2004},
	month = {mar},
	pages = {27{\textendash}37},
	abstract = {Nonlinear mixed-effect models are often used in the analysis of longitudinal data. However, it sometimes happens that missing values for some of the model covariates are not purely random. Motivated by an application to HTV viral dynamics, where this situation occurs, the author considers likelihood inference for this type of problem. His approach involves a Monte Carlo EM algorithm, along with a Gibbs sampler and rejection/importance sampling methods. A concrete application is provided.},
	keywords = {EM algorithm, Gibbs sampling, Longitudinal data, missing data, Rejection sampling},
	issn = {1708-945X},
	doi = {10.2307/3315997},
	url = {http://onlinelibrary.wiley.com/doi/10.2307/3315997/abstract},
	author = {WU, LANG}
}
