Clarifying the costs of theophylline toxicity.
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D002927:Cimetidine / Q000009:adverse effects; D002983:Clinical Competence; D003362:Cost-Benefit Analysis; D004347:Drug Interactions; D011307:Drug Prescriptions / Q000592:standards; D006801:Humans; D010353:Patient Education as Topic; D010820:Physicians / Q000592:standards*; D013806:Theophylline / Q000009:adverse effects*