TY  - RPRT
TI  - Clinical trials and external validity.
AU  - B Kinosian
AU  - H Glick
PY  - 1998
DO  - 10.1046/j.1524-4733.1998.130181.x
UR  - https://pubmed.ncbi.nlm.nih.gov/16674350/
ID  - 16674350
ER  -