1Ttoh Y, Hada T,Terano A ,et al. Pancreatitis in the annulus of annular pancreas demonstrated by the combined use of computed tomography and endoscopic retrograde cholangiopancreatography. Am J Gastroenterol, 1989,84 : 961.
2Ueki T, Yao T, Beppu T, et al. Three-dimensional computed tomography pancreatography of an annular pancreas with special reference to embryogenesis. Pancreas ,2006,32:426.
