6-mm vs 10-mm diameter fully covered self-expandable metal stents in patients with unresectable malignant distal bile duct stricture (COSMIC UNISON): study protocol for a multicenter, randomized controlled trial

Table 1 Participating institutions and investigators

Study site	Name of participating medical institution	Investigator name
1	Shizuoka Cancer Center	Junya Sato
2	Shizuoka General Hospital	Shinya Kawaguchi
3	Kanazawa Medical University Hospital	Tsuyoshi Mukai
4	Gifu Municipal Hospital	Keisuke Iwata
5	Gifu Prefectural Tajimi Hospital	Fumihiro Okumura
6	Gifu General Medical Center	Akinori Maruta
7	Hamamatsu University Hospital	Ken Sugimoto
8	Aichi Medical University Hospital	Tadahisa Inoue
9	Nagoya University Hospital	Hiroki Kawashima
10	Fujita Medical University Hospital	Yoshiki Hirooka
11	Aichi Cancer Center	Kazuo Hara
12	Kumamoto University Hospital	Motohiro Yoshinari
13	Kumamoto City Hospital	Shunpei Hashigo
14	Seirei Hamamatsu Hospital	Yosuke Kobayashi
15	Mie University Hospital	Reiko Yamada
16	Kagawa University Hospital	Hideki Kamada
17	Kuwana City General Medical Center	Yumi Oya
18	Yokkaichi Hazu Medical Center	Shigehito Nakashima
19	Suzuka Kaisei Hospital	Shunsuke Tano
20	Saiseikai Matsusaka General Hospital	Akira Hashimoto
21	Matsusaka Chuo General Hospital	Hiroaki Naota
22	Okanami General Hospital	Hajime Imai
23	Ise Red Cross Hospital	Toji Murabayashi

ISSN: 1745-6215