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Used to Mean per 


Cheryl Iverson

In the “per” construction, use a forward slash only when (1) the construction involves units of measure (including time) and (2) at least 1 element includes a specific numerical quantity and (3) the element immediately adjacent on each side is either a specific numerical quantity or a unit of measure. In such cases, the units of measure should be abbreviated in accordance with , Abbreviations, Units of Measure. (See also , Numbers and Percentages, Forms of Numbers, Reporting Proportions and Percentages.)The hemoglobin level was 14 g/dL. The CD4+ cell count was 200/μL. Blood volume was 80 mL/kg of body weight.

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