TY  - RPRT
TI  - Frequent-user subgroups.
AU  - E S Casper
AU  - J R Regan
PY  - 1992
DO  - 10.1176/ps.43.1.83
UR  - https://pubmed.ncbi.nlm.nih.gov/1622468/
ID  - 1622468
ER  -