Tanahashi, Yukichi
Kondo, Hiroshi
Yamamoto, Masayoshi
Osawa, Marie
Yokoyama, Taro
Sugawara, Toshimasa
Kawada, Hiroshi
Goshima, Satoshi
Matsuo, Masayuki
Furui, Shigeru
Oba, Hiroshi
Article History
Received: 14 November 2017
Accepted: 6 July 2018
First Online: 10 July 2018
Compliance with Ethical Standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest. The added co-author, Dr. Hiroshi Kawada, has no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional review board and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This retrospective study design was also approved by our institutional review board, and written informed was not required.