TY  - RPRT
TI  - Rationale and statistical methodology for the VISA studies.
AU  - M J Ratcliffe
AU  - M J Godley
PY  - 1989
DO  - 10.2165/00003495-198900382-00013
UR  - https://pubmed.ncbi.nlm.nih.gov/2575981/
ID  - 2575981
ER  -