TY  - RPRT
TI  - Assessing missing data assumptions in longitudinal studies: an example using a smoking cessation trial.
AU  - Xiaowei Yang
AU  - Steven Shoptaw
PY  - 2005
DO  - 10.1016/j.drugalcdep.2004.08.018
UR  - https://pubmed.ncbi.nlm.nih.gov/15734221/
ID  - 15734221
ER  -