Tanikawa, Hidenori
Ogawa, Ryo
Okuma, Kazunari
Harato, Kengo
Niki, Yasuo
Kobayashi, Shu
Nagura, Takeo
Article History
Received: 22 January 2018
Accepted: 26 March 2018
First Online: 5 April 2018
Ethics approval and consent to participate
: This study followed the Declaration of Helsinki and was approved by the local ethics committee of the Saitama City Hospital, Saitama, Japan.
: Not applicable.
: The authors declare that they have no competing interests.
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