//-->
Linear models for the analysis of longitudinal studies
Ware, James H., (1985)
Comment - Correcting for Omitted-Variables and Measurement-Error Bias in Regresssion With an Application to the Effect of Lead on IQ
Rogan, Walter J., (1998)
Predictors of simple diarrhoea in children under 5 years--A study of a sudanese rural community
El Samani, Fatih Z., (1989)