TY  - RPRT
TI  - Epidural opioid requirements.
AU  - O A de Leon-Casasola
AU  - M J Lema
PY  - 1991
DO  - 10.1097/00000542-199106000-00035
UR  - https://pubmed.ncbi.nlm.nih.gov/1710429/
ID  - 1710429
ER  -