TY  - RPRT
TI  - Specialization by practice location.
AU  - S D Fihn
PY  - 1999
DO  - 10.1046/j.1525-1497.1999.00316.x
UR  - https://pubmed.ncbi.nlm.nih.gov/10203631/
ID  - 10203631
ER  -