Terumi Morita, Kenji Furuta, Kyoichi Adachi, Shunji Ohara, Takashi Tanimura, Kenji Koshino, Tomochika Uemura, Kohji Naora and Yoshikazu Kinoshita. J Neurogastroenterol Motil 2012;18:181-6. https://doi.org/10.5056/jnm.2012.18.2.181