TY  - RPRT
TI  - Commentary: what is this thing called "control"?
AU  - J M Green
PY  - 1999
DO  - 10.1046/j.1523-536x.1999.00051.x
UR  - https://pubmed.ncbi.nlm.nih.gov/10352056/
ID  - 10352056
ER  -