%0 Journal Article %T Synaptic interactions of retrogradely labeled genioglossus motoneurons with substance P-like immunoreactive terminals in the cat: a double labeling immunoelectron microscopic study %A Gatti PJ %A Richardson KA %J Respiratory Research %D 2001 %I BioMed Central %R 10.1186/rr145 %U http://dx.doi.org/10.1186/rr145