TY  - RPRT
TI  - The Zebra system--a new patient classification system.
AU  - A K Levenstam
AU  - I B Engberg
PY  - 1993
DO  - 10.1111/j.1365-2834.1993.tb00218.x
UR  - https://pubmed.ncbi.nlm.nih.gov/8313064/
ID  - 8313064
ER  -