Glial proinflammatory cytokines mediate exaggerated pain states: implications for clinical pain / Linda R. Watkins, Erin D. Milligan, and Steven F. Maier -- Peripheral hyperalgesic cytokines / Fernando Q. Cunha and Sergio H. Ferreira -- Cytokines and peripheral analgesia / Michael Schfer -- Opioid peptides in immune cells / Eric M. Smith -- Opioid receptors on peripheral sensory neurons / Christoph Stein -- Morphological correlates of immune-mediated peripheral opioid analgesia / Shaaban A. Mousa -- Functional evidence of pain control by the immune system / Halina Machelska -- Opioid receptor expression and intracellular signaling by cells involved in host defense and immunity / Burt M. Sharp -- Experimental evidence for immunomodulatory effects of opioids / Paola Sacerdote, Elena Limiroli and Leda Gaspani -- The immune-suppressive effects of pain / Gayle G. Page -- Invertebrate opiate immune and neural signaling / George B. Stefano ... [et al.] -- Anti-inflammatory effects of opioids / Judith S. Walker