TY  - RPRT
TI  - A practical approach to determine cutoff concentrations for opiate testing with simultaneous detection of codeine, morphine, and 6-acetylmorphine in urine.
AU  - B D Paul
AU  - E T Shimomura
AU  - M L Smith
PY  - 1999
UR  - https://pubmed.ncbi.nlm.nih.gov/10102911/
ID  - 10102911
ER  -