Investigator initiated clinical trial to validate usefulness of specific system for endoscopic ultrasound guided hepaticogastrostomy (HG01) in malignant biliary obstruction (HG01) by Masahiro Itonaga, MD, PhD, Masayuki Kitano, MD, PhD, Hiroyuki Isayama, MD, PhD, Mamoru Takenaka, MD, PhD, Takeshi Ogura, MD, PhD, Yasunobu Yamashita, MD, PhD, Toshio Fujisawa, MD, PhD, Kosuke Minaga, MD, PhD, Atsushi Okuda, MD, PhD, Toshio Shimokawa, PhD

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