A 40-year-old woman with bipolar disorder presents to your o…
A 40-year-old woman with bipolar disorder presents to your office after starting a new medication. She reports that she was doing “well” until she got a viral gastroenteritis and was unable to eat for several days. While the viral symptoms have resolved, she now complains of nausea and vomiting, ataxia, and tremor. Which of the following studies would you order?
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