TY  - RPRT
TI  - Postdural puncture headache and extradural blood patch.
AU  - S Harrod
AU  - J M Foster
PY  - 1993
DO  - 10.1093/bja/71.5.775
UR  - https://pubmed.ncbi.nlm.nih.gov/8251301/
ID  - 8251301
ER  -