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MALCOLM C. SPENCER, MD

Arch Dermatol. 1966;93(1):47-48.

Abstract
Comparison of open and closed patch tests with oleoresins was done on a group of patients with active dermatitis venenata. Equalization of positive reactions from open and closed patch tests occurred during the interval between the initial reading and subsequent observation. If epidermal sensitivity was slight, only a positive closed patch test occurred. This accounted for the difference (13%) between the open and closed patchtest results reported in this study.

Author Affiliations
DANVILLE, ILL

From the Department of Dermatology, Northwestern University Medical School, Chicago.

Footnotes
Accepted for publication June 25, 1965.

Reprint requests to 605 North Logan Ave, Danville, Ill 61833.

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