TY  - RPRT
TI  - [Regional variations in health services: various methodological problems].
AU  - V Koehn
AU  - F Paccaud
PY  - 1996
DO  - 10.1007/bf01323084
UR  - https://pubmed.ncbi.nlm.nih.gov/8693808/
ID  - 8693808
ER  -