Asano H, Tomita T, Nakamura K, Yamasaki T, Okugawa T, Kondo T, Kono T, Tozawa K, Ohda Y, Oshima T, Fukui H, Fukushima K, Hirota S, Watari J, Miwa H.  Prevalence of Gastric Motility Disorders in Patients with Functional Dyspepsia.  J Neurogastroenterol Motil 2017;23:392-399.  https://doi.org/10.5056/jnm16173