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3. A hypocomplementemic vasculitic urticarial syndrome;Zeiss;Am J Med,1980
4. Hereditary C2 deficiency in systemic lupus erythematosus and acquired complement abnormalities in an unusual SLE-related syndrome;Agnello;Birth Defects,1975
5. Vasculitis in chronic urticaria;Monroe;J Invest Dermatol,1981