TY  - RPRT
TI  - Explanations for improvement in both experimental and control groups.
AU  - Heather Becker
AU  - Greg Roberts
AU  - Wayne Voelmeck
PY  - 2003
DO  - 10.1177/0193945903253002
UR  - https://pubmed.ncbi.nlm.nih.gov/14528620/
ID  - 14528620
ER  -