TY  - RPRT
TI  - Solid-phase extraction protocol for isolating retinol-d4 and retinol from plasma for parallel processing for epidemiological studies.
AU  - S R Dueker
AU  - J M Lunetta
AU  - A D Jones
AU  - A J Clifford
PY  - 1993
UR  - https://pubmed.ncbi.nlm.nih.gov/8222228/
ID  - 8222228
ER  -