Kanemasa, Yusuke http://orcid.org/0000-0002-9809-2008
Shimoyama, Tatsu
Sasaki, Yuki
Hishima, Tsunekazu
Omuro, Yasushi
Article History
Received: 6 December 2017
Accepted: 31 January 2018
First Online: 9 February 2018
Compliance with ethical standards
: The protocol for this study was approved by the institutional ethics review board of our hospital, and informed consent for retrospective analysis was obtained from all patients.
: The authors declare that they have no conflict of interest.