The authors thank Keiji Yamamoto, Atsushi Shiono, and Tomoyoshi Morioku for their technical assistance during the electrophysiological study, Kohei Ukita, Koji Yasumoto, Yasuharu Matsunaga-Lee, and Masamichi Yano for their assistance of electrophysiological interpretation during the procedure, and Mr. John Martin for his linguistic assistance with this manuscript.