TY  - RPRT
TI  - Extradural catheterization.
AU  - A P Andersen
AU  - J Sörensen
PY  - 1998
DO  - 10.1093/bja/81.2.298
UR  - https://pubmed.ncbi.nlm.nih.gov/9813547/
ID  - 9813547
ER  -