TY  - RPRT
TI  - Candidate reference method for determining serum theophylline applied to target-setting in external quality assessment and routine method evaluation.
AU  - L M Thienpont
AU  - B Van Nieuwenhove
AU  - D Stöckl
AU  - A P De Leenheer
PY  - 1994
UR  - https://pubmed.ncbi.nlm.nih.gov/7677808/
ID  - 7677808
ER  -