Immunoreactive calcitonin gene-related peptide and substance P coexist in sensory neurons to the spinal cord and interact in spinal behavioral responses of the rat. - Wiesenfeld-Hallin,Z.; Hokfelt,T.; Lundberg,J.M.; Forssmann,W.G.; Reinecke,M.; Tschopp,F.A.; Fischer,J.A. (Neurosci Lett, 1984)