@misc{indiciae9c4553983017,
  title = {Regression analysis with missing covariate data using estimating equations.},
  author = {L P Zhao and S Lipsitz and D Lew},
  year = {1996},
  url = {https://pubmed.ncbi.nlm.nih.gov/8962448/},
  note = {Source identifier: 8962448}
}