Ethical Disclosures
All procedures were conducted in accordance with the ethical standards of the institutional and/or national research committees at which each component of this multicenter collaboration study were conducted (IRB approval numbers 061171, 08212, and 13134 by the ethics committee of Osaka University Hospital), as well as in accordance with the principles of the Declaration of Helsinki.
Acknowledgements
JNSCS has been supported by several investigators in the 54 participating facilities; Hokkaido University Hospital, Sapporo, Hokkaido (Saori Nishio, Yasunobu Ishikawa, Daigo Nakazawa, and Tasuku Nakagaki); JCHO Sendai Hospital, Sendai, Miyagi (Toshinobu Sato, Mitsuhiro Sato, and Satoru Sanada); Tohoku University Hospital, Sendai, Miyagai (Hiroshi Sato, Mariko Miyazaki, Takashi Nakamichi, Tae Yamamoto, Kaori Narumi, and Gen Yamada); Yamagata University Hospital, Yamagata, Yamagata (Tsuneo Konta, and Kazuobu Ichikawa); Fukushima Medical University Hospital, Fukushima, Fukushima (Junichiro James Kazama, Tsuyoshi Watanabe, Koichi Asahi, Yuki Kusano, and Kimio Watanabe); University of Tsukuba Hospital, Tsukuba, Ibaraki (Kunihiro Yamagata, Joichi Usui, Shuzo Kaneko, and Tetsuya Kawamura); Gunma University Hospital, Maeashi, Gunma (Keiju Hiromura, Akito Maeshima, Yoriaki Kaneko, Hidekazu Ikeuchi, Toru Sakairi, and Masao Nakasatomi); Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama (Hajime Hasegawa, Takatsugu Iwashita, Taisuke Shimizu, Koichi Kanozawa, Tomonari Ogawa, Kaori Takayanagi, and Tetsuya Mitarai); Saitama Medical University, Irumagun, Saitama (Hirokazu Okada, Tsutomu Inoue, Hiromichi Suzuki, and Kouji Tomori); Tokyo Women’s Medical University, Shinjuku-ku, Tokyo (Kosaku Nitta, Takahito Moriyama, Akemi Ino, and Masayo Sato); Teikyo University School of Medicine, Itabashi-ku, Tokyo (Shunya Uchida, Hideaki Nakajima, Hitoshi Homma, Nichito Nagura, Yoshifuru Tamura, Shigeru Shibata, and Yoshihide Fujigaki); Juntendo Faculty of Medicine, Bunkyo-ku, Tokyo (Yusuke Suzuki, Yukihiko Takeda, Isao Osawa, and Teruo Hidaka); St. Marianna University, Kawasaki, Kanagawa (Yugo Shibagaki, Sayuri Shirai, Daisuke Ichikawa, Tsutomu Sakurada, Tomo Suzuki, and Mikako Hisamichi); Niigata University Medical and Dental Hospital, Niigata, Niigata (Ichiei Narita, Naohumi Imai, Yumi Ito, Shin Goto, Yoshikatsu Kaneko, and Rhohei Kaseda); Kanazawa Medical University, Uchinada, Ishikawa (Hitoshi Yokoyama, Keiji Fujimoto, and Norifumi Hayashi); Kanazawa Univeristy Hospital, Kanazawa, Ishikawa (Takashi Wada, Miho Shimizu, Kengo Furuichi, Norihiko Sakai, Yasunori Iwata, Tadashi Toyama, and Shinji Kitajima); National Hospital Organization Kanazawa Medical Center, Kanazawa, Ishikawa (Kiyoki Kitagawa); Ogaki Municipal Hospital, Ogaki, Gifu (Hiroshi Sobajima, Norimi Ohashi, So Oshitani, and Kiyohito Kawashima); Gifu Prefectural Tajimi Hospital, Tajimi, Gifu (Tetsushi Mimura); Hamamatsu University Hospital, Hamamatsu, Shizuoka (Hidemo Yasuda, Akira Hishida, and Yoshihide Fujigaki); Shizuoka General Hospital, Shizuoka, Shizuoka (Satoshi Tanaka, and Noriko Mori); Chutoen General Medical Center, Kakegawa, Shizuoka (Toshiyuki Akahori, and Yutaka Fujita); Nagoya University Graduate School of Medicine, Nagoya, Aichi (Shoichi Maruyama, Naotake Tsuboi, Tomoki Kosugi, Takuji Ishimoto, Takayuki Katsuno, Noritoshi Kato, and Waichi Sato); Japanese Red Cross Nagoya Daini Hospital, Nagoya, Aichi (Asami Takeda, Kunio Morozumi, Yasuhiro Ohtsuka, Hibiki Shinjo, and Akihito Tanaka); Fujita Health University School of Medicine, Toyoake, Aichi (Hiroki Hayashi, Yukio Yuzawa, Midori Hasegawa, Daijo Inaguma, Shigehisa Koide, and Kazuo Takahashi); Konan Kosei Hospital, Konan, Aichi (Takeyuki Hiramatsu, Shinji Furuta, and Hideaki Ishikawa); Anjo Kosei hospital, Anjo, Aichi (Hirofumi Tamai, and Takatoshi Morinaga); Ichinomiya Municipal Hospital, Ichinomiya, Aichi (Arimasa Shirasaki, Toshiki Kimura, and Mina Kato); Japanese Red Cross Nagoya Daiichi Hospital, Nagaoya, Aichi (Shizunori Ichida, and Nobuhide Endo); Kasugai Municipal Hospital, Kasugai, Aichi (Tomohiko Naruse, Yuzo Watanabe, and Yosuke Saka); Kainan hospital, Yatomi, Aichi (Satashi Suzuki, Michiko Yamazaki, and Rieko Morita); Masuko Memorial Hospital, Nagoya, Aichi (Kunio Morozumi, Kunio Morozumi, Kaoru Yasuda, Chika Kondo, Takahiro Morohiro, Rho Sato, and Yuichi Shirasawa); Chubu Rosai Hospital, Nagoya, Aichi (Yoshiro Fujita, Hideaki Shimizu, and Tatsuhito Tomino); Handa City Hospital, Handa, Aichi (Makoto Mizutani); Yokkaichi Municipal Hospital, Yokkaichi, Mie (Yosuke Saka, Hiroshi Nagaya, and Makoto Yamaguchi); Kitano Hospital, Osaka, Osaka (Tatsuo Tsukamoto, Eri Muso, Hiroyuki Suzuki, Tomomi Endo, and Hiroko Kakita); Toyonaka Municipal Hospital, Toyonaka, Osaka (Megumu Fukunaga); Osaka General Medical Center, Osaka, Osaka (Tatsuya Shoji, and Terumasa Hayashi); Osaka City University Hospital, Osaka, Osaka (Eiji Ishimura, Akihiro Tsuda, Shinya Nakatani, Ikue Kobayashi, Mitsuru Ichii, Akinobu Ochi, and Yoshiteru Ohno); Osaka Univeristy hospital, Suita, Osaka (Yoshitaka Isaka, Enyu Imai, Yasuyuki Nagasawa, Hirotsugu Iwatani, Ryohei Yamamoto, and Tomoko Namba); Kobe University hospital, Kobe, Hyogo (Shunsuke Goto MD, and Shinichi Nishi); Nara Medical University Hospital, Kashihara, Nara (Yasuhiro Akai, Ken-ichi Samejima, Masaru Matsui, Miho Tagawa, Kaori Tanabe, and Hideo Tsushima); Wakayama Medical University Hospital, Wakayama, Wakayama (Takashi Shigematsu, Masaki Ohya, Shigeo Negi, and Toru Mima); Shimane University Hospital, Izumo, Shimane (Takafumi Ito); Okayama Univeristy Hospital, Okayama, Okayama (Hitoshi Sugiyama, Keiko Tanaka, Toshio Yamanari, Masashi Kitagawa, Akifumi Onishi, and Koki Mise); Kawasaki Medical School, Kurashiki, Okayama (Naoki Kashihara, Tamaki Sasaki, Sohachi Fujimoto, and Hajime Nagasu); Graduate School of Medicine, The University of Tokushima,Tokushima,Tokushima (Kojiro Nagai, and Toshio Doi); Kagawa University, Miki-cho, Takamatsu, Japan (Tadashi Sofue, Hideyasu Kiyomoto, Kumiko Moriwaki, Taiga Hara, Yoko Nishijima, Yoshio Kushida, and Tetsuo Minamino); Kochi Medical School, Kochi University, Nankoku, Kochi (Yoshio Terada, Taro Horino, Yoshinori Taniguchi, Kosuke Inoue, Yoshiko Shimamura, and Tatsuki Matsumoto); Kyushu University Hospital, Fukuoka, Fukuoka (Kazuhiko Tsuruya, Hisako Yoshida, Naoki Haruyama, Shunsuke Yamada, Akihiro Tsuchimoto, and Yuta Matsukuma); Fukuoka University Hospital, Fukuoka, Fukuoka (Kosuke Masutani, Yasuhiro Abe, Aki Hamauchi, Tetsuhiko Yasuno, and Kenji Ito); Kurume University Hospital, Kurume, Fukuoka (Kei Fukami, Junko Yano, Chika Yoshida, Yuka Kurokawa, and Nao Nakamura); National Fukuoka Higashi Medical Center, Koga, Fukuoka (Ritsuko Katafuchi, Hiroshi Nagae, Shumei Matsueda, and Kazuto Abe); Nagasaki University Hospital, Nagasaki, Nagasaki (Tomoya Nishino, Tadashi Uramatsu, and Yoko Obata); Miyazaki University Hospital, Miyazaki, Miyazaki (Shouichi Fujimoto, Yuji Sato, Masao Kikuchi, Ryuzo Nishizono, Takashi Iwakiri, and Hiroyuki Komatsu).
We would like to thank Editage (www.editage.com) for English language editing.
Conflict of Interest Statement
All authors declare that they have no financial or other conflicts of interest.
Authors’ Contributions
Study concept and design: SS, KN, HN, YS, and NK.
Data collection: YS, RY, KN, TT, SU, AT, and the other members of the JNSCS Study Group. Data analysis: SS, KN, HN, and NK.
Data interpretation: SS, KN, HN, YS, RY, TT, SU, AT, HO, IN, YI, and NK.
Manuscript preparation: SS, KN, HN, and NK.
Data Availability Statement
The data underlying this article will be shared on reasonable request to the corresponding author.