TY  - RPRT
TI  - Collapsing ordered outcome categories: a note of concern.
AU  - U Strömberg
PY  - 1996
DO  - 10.1093/oxfordjournals.aje.a008944
UR  - https://pubmed.ncbi.nlm.nih.gov/8712200/
ID  - 8712200
ER  -