Tatsuta T, Sato H, Fujiyoshi Y, Abe H, Shiwaku A, Shiota J, Sato C, Ominami M, Hata Y, Fukuda H, Ogawa R, Nakamura J, Ikebuchi Y, Yokomichi H, Fukuda S, Inoue H.  Subtype of Achalasia and Integrated Relaxation Pressure Measured Using the Starlet High-resolution Manometry System: A Multicenter Study in Japan.  J Neurogastroenterol Motil 2022;28:562-571.  https://doi.org/10.5056/jnm21254