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      <subfield code="a">Objective: To determine the percentage of patients given standard doses of piperacillin/tazobactam or meropenem by continuous infusion who achieved the target pharmacokinetic/pharmacodynamic (PK/PD) index, which was defined as free concentrations four times more than the minimum inhibitory KEYWORDS Beta-lactams; Critical care; Pharmacokinetics; Drug monitoring; Piperacillin; Meropenem.</subfield>
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