title: Drug concentration errors related to sampling from Silastic catheters.
mesh_terms: D002408:Catheters, Indwelling; D005189:False Positive Reactions; D005472:Fluorouracil / Q000008:administration & dosage / Q000097:blood*; D006801:Humans; D007263:Infusions, Parenteral; D012826:Silicone Elastomers
chemical_list: D012826:Silicone Elastomers; D005472:Fluorouracil