Miyayama S, Yamashiro M, Ikeda R, Matsumoto J, Ogawa N, Notsumata K.  Balloon-occluded retrograde transvenous obliteration for six consecutive patients with duodenal varices.  Int J Gastrointest Interv 2022;11:13-17.  https://doi.org/10.18528/ijgii210026