Shigematsu, Hideo https://orcid.org/0000-0001-9393-9655
Nishina, Mai
Yasui, Daisuke
Hirata, Taizo
Ozaki, Shinji
Article History
Received: 5 September 2018
Accepted: 18 February 2019
First Online: 23 February 2019
Ethics approval and consent to participate
: This study was approved by the ethics committee of the Kure Medical Center review board approved this study (30-05) in accordance with the Declaration of Helsinki. The requirement for informed consent from individual patients was waived because this was a retrospective review of a prospectively maintained patient database.
: Not applicable.
: The authors declare that they have no competing interests.
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