TY  - RPRT
TI  - Exploring the methodological challenges of investigating comparison groups with different underlying characteristics: a case study.
AU  - Raul Arocho
AU  - Amy Solis
AU  - Sally Wade
AU  - George Goldberg
AU  - Simon Tang
DO  - 10.18553/jmcp.2002.8.5.353
UR  - https://pubmed.ncbi.nlm.nih.gov/14613401/
ID  - 14613401
ER  -