Clinical Outcomes of Multi‐Hole Covered Self‐Expandable Metal Stents for Malignant Distal Biliary Obstruction: A Retrospective Comparative Study With an Exploratory Evaluation of 6‐mm Devices - Akinobu Koiwai; Yuki Miyashita; Nana Inomata; Takehito Ito; Morihisa Hirota; Kennichi Satoh (DEN Open, 2027)