TY  - RPRT
TI  - Codeine analgesia is due to codeine-6-glucuronide, not morphine.
AU  - T B Vree
AU  - R T van Dongen
AU  - P M Koopman-Kimenai
UR  - https://pubmed.ncbi.nlm.nih.gov/11092114/
ID  - 11092114
ER  -