TY  - RPRT
TI  - Additional considerations in longitudinal database research.
AU  - Elizabeth B Andrews
AU  - Susan Eaton
DO  - 10.1046/j.1524-4733.2003.t01-1-00001.x
UR  - https://pubmed.ncbi.nlm.nih.gov/12641856/
ID  - 12641856
ER  -