Existence of PYY neurons in the canine enteric nerves system and its histological relationship to cholinergic neurons: K. Iesaki, ∗T. Sakai, M. Satoh, K. Tohhara, T. Yamada, Z. Itoh. GI Res. Lab., Institute for Molecular and Cellular Regulation, Gunma University, Maebashi and ∗Dept. of Regulation Biology, Faculty of Science, Saitama University, Japan