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Previous Volume 340:568 February 18, 1999 Number 7 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

	Full Text Purchase this article Add to Personal Archive Add to Citation Manager Notify a Friend E-mail When Cited Related Article by Slifman, N. R.

To the Editor: The investigation by Slifman and colleagues of the contamination of a dietary supplement with Digitalis lanata (Sept. 17 issue)¹ is a splendid example of how cause and effect can be established by clinical correlation and the use of laboratory analysis of both the patient's serum and the ingested product. Unfortunately, an adequate workup of such cases is the exception. Although digoxin assays are generally available, assays of body fluids for other botanicals and dietary supplements are not. . . .

The unavailability of tissue assays for dietary supplements hampered our study group's effort to evaluate causation in . . . [Full Text of this Article]

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