Do drug copayments work?
David
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D003363:Cost Control; D017047:Cost Sharing; D016527:Drug Costs; D011307:Drug Prescriptions / Q000191:economics; D004363:Drug Utilization / Q000191:economics; D006801:Humans; D007349:Insurance, Health, Reimbursement; D007356:Insurance, Pharmaceutical Services / Q000191:economics*