Unilateral versus Bilateral Endoscopic Nasobiliary Drainage and Subsequent Metal Stent Placement for Unresectable Malignant Hilar Obstruction: A Multicenter Randomized Controlled T... by Ryunosuke Hakuta, Hirofumi Kogure, Yousuke Nakai, Hiroshi Kawakami, Hiroyuki Maguchi, Tsuyoshi Mukai, Takuji Iwashita, Tomotaka Saito, Osamu Togawa, Saburo Matsubara, Tsuyoshi Hayashi, Iruru Maetani, Yukiko Ito, Osamu Hasebe, Takao Itoi, Keiji Hanada, Hiroyuki Isayama

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