Surgical productivity recovery after the COVID-19 pandemic in Japan by Yoshinori Nakata, Yoshinori Nakata, Yuichi Watanabe, Akihiko Ozaki

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Equality of Surgical Fee Schedule in Japan: A Retrospective Observational Study by Yoshinori Nakata, Yuichi Watanabe, Hiroshi Otake

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Surgical productivity did not suffer despite the states of emergency against the COVID-19 pandemic in Japan: a retrospective observational study by Yoshinori Nakata, Yuichi Watanabe, Akihiko Ozaki

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Do technically efficient surgeons continue to provide active clinical services in a university hospital? by Yoshinori Nakata, Yuichi Watanabe, Hiroshi Otake, Akihiko Ozaki

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Association Between Surgeons’ Technical Efficiency and Hospital Revenue by Yoshinori Nakata MD, MBA, Yuichi Watanabe MS, MPH, Hiroshi Otake MD, MBA

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Productivity Change of Surgeons During the Coronavirus Disease 2019 Pandemic in Japan by Yoshinori Nakata MD, MBA, Yuichi Watanabe MS, MPH, Akihiko Ozaki MD, DrPH

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Applying data envelopment analysis to preventive medicine: a novel method for constructing a personalized risk model of obesity. by Hiroto Narimatsu, Yoshinori Nakata, Sho Nakamura, Hidenori Sato, Ri Sho, Katsumi Otani, Ryo Kawasaki, Isao Kubota, Yoshiyuki Ueno, Takeo Kato, Hidetoshi Yamashita, Akira Fukao, Takamasa Kayama

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Correlation Between Walking Ability and Monthly Care Costs in Elderly Patients After Surgical Treatments for Hip Fractures by Koki Abe, Kazuhide Inage, Keishi Yamashita, Masaomi Yamashita, Akiyoshi Yamamaoka, Masaki Norimoto, Yoshinori Nakata, Takeshi Mitsuka, Kaoru Suseki, Sumihisa Orita, Kazuki Fujimoto, Yasuhiro Shiga, Hirohito Kanamoto, Masahiro Inoue, Hideyuki Kinoshita, Tomotaka Umimura, Yawara Eguchi, Takeo Furuya, Kazuhisa Takahashi, Seiji Ohtori

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