Figure 1.  Release of immune mediators after exposure to plicatic acid.  A significant increase in histamine and leukotriene E4 levels was seen only for WRCA patients.  Adapted from Chan-Yeung et al.1989.

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Effects of Softwoods on Respiratory Physiology and Function
Effects of Softwoods on Liver Physiology and Function
Additional Harmful Chemicals in Softwoods
Alternative Beddings for Companion Animals

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