frequently having a depressed slate-blue center. Occasionally, there was a central vesicle. "Iris" and "target" lesions were frequently observed. The majority of the erythema-multiforme lesions ...
In this double-blind trial, researchers randomized 180 patients (minimum age, 16) with annular skin lesions (erythema migrans ... placebo-controlled trial. Ann Intern Med 2003 May 6; 138:697-704.
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