TY  - RPRT
TI  - Maximum likelihood methods for nonignorable missing responses and covariates in random effects models.
AU  - Amy L Stubbendick
AU  - Joseph G Ibrahim
PY  - 2003
DO  - 10.1111/j.0006-341x.2003.00131.x
UR  - https://pubmed.ncbi.nlm.nih.gov/14969495/
ID  - 14969495
ER  -