TY  - RPRT
TI  - Testing for experimental effects in the pretest-posttest design.
AU  - M J Egger
AU  - J R Miller
DO  - 10.1097/00006199-198409000-00015
UR  - https://pubmed.ncbi.nlm.nih.gov/6566135/
ID  - 6566135
ER  -