Kitaguchi, Daichi
Enomoto, Tsuyoshi
Ohara, Yusuke
Owada, Yohei
Hisakura, Katsuji
Akashi, Yoshimasa
Takahashi, Kazuhiro
Ogawa, Koichi
Shimomura, Osamu
Oda, Tatsuya
Article History
Received: 29 November 2019
Accepted: 28 February 2020
First Online: 19 March 2020
Ethics approval and consent to participate
: Written informed consent was preoperatively obtained from all patients. The protocol for this prospective observational study was approved by the ethics committee of the University of Tsukuba Hospital (registration No. R01–104). The study conforms to the provisions of the Declaration of Helsinki in 1964 (as revised in Brazil in 2013).
: Not applicable.
: The authors declare that they have no competing interests.