TY  - RPRT
TI  - Research design clarified.
AU  - P P Freddolino
AU  - D P Moxley
AU  - J A Fleishman
PY  - 1990
DO  - 10.1176/ps.41.7.807
UR  - https://pubmed.ncbi.nlm.nih.gov/2194928/
ID  - 2194928
ER  -