TY  - RPRT
TI  - Pooled time series regression analysis in longitudinal studies.
AU  - M M Ward
AU  - J P Leigh
PY  - 1993
DO  - 10.1016/0895-4356(93)90038-3
UR  - https://pubmed.ncbi.nlm.nih.gov/8326350/
ID  - 8326350
ER  -