@misc{indiciaec25a13797646,
  title = {Assessing missing data assumptions in longitudinal studies: an example using a smoking cessation trial.},
  author = {Xiaowei Yang and Steven Shoptaw},
  year = {2005},
  doi = {10.1016/j.drugalcdep.2004.08.018},
  url = {https://pubmed.ncbi.nlm.nih.gov/15734221/},
  note = {Source identifier: 15734221}
}