Ichiyanagi, Osamu http://orcid.org/0000-0003-4573-5003
Fukuhara, Hiroki
Kurokawa, Masayuki
Izumi, Takuji
Suzuki, Hitoshi
Naito, Sei
Nishida, Hayato
Kato, Tomoyuki
Tsuchiya, Norihiko
Article History
Received: 27 October 2018
Accepted: 24 December 2018
First Online: 2 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committees and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study formal consent is not required, because the present study was retrospective and the anonymity of the participants was ensured.
: For this type of study formal consent is not required, because the present study was retrospective and the anonymity of the participants was ensured.