title: Letter: Drug levels.
mesh_terms: D000082:Acetaminophen / Q000097:blood / Q000506:poisoning; D002249:Carbon Monoxide Poisoning / Q000175:diagnosis; D006801:Humans; D011041:Poisoning / Q000175:diagnosis*; D012459:Salicylates / Q000097:blood / Q000506:poisoning
chemical_list: D012459:Salicylates; D000082:Acetaminophen