TY  - RPRT
TI  - Implications of regional differences in spending.
AU  - Howard A Levin
PY  - 2004
DO  - 10.7326/0003-4819-140-2-200401200-00020
UR  - https://pubmed.ncbi.nlm.nih.gov/14734342/
ID  - 14734342
ER  -