Activation of complement by plicatic acid, the chemical compound responsible for asthma due to western red cedar (Thuja plicata).
Chan-Yeung M, Giclas PC, Henson PM. Activation of complement by plicatic acid, the chemical compound responsible for asthma due to western red cedar (Thuja plicata). J Allergy Clin Immunol. 1980 May; 65(5):333-7.