TY  - RPRT
TI  - Ensuring the comparability of comparison groups: is randomization enough?
AU  - Vance W Berger
AU  - Sherri Weinstein
PY  - 2004
DO  - 10.1016/j.cct.2004.04.001
UR  - https://pubmed.ncbi.nlm.nih.gov/15465620/
ID  - 15465620
ER  -