In most career fire departments, firefighters work __________ shifts and then are off duty for a designated period of time

Which reference source is a combination of two official compendia?

A) FDA Orange Book B) USP-NF C) PDR D) Martindale: The Complete Drug Reference

In a specimen collected for plasma glucose analysis, sodium fluoride:

A. Serves as a coenzyme of hexokinase B. Prevents reactivity of non glucose reducing substances C. Precipitates protein D. Inhibits glycolysis