Inamo, Jun
Kaneko, Yuko
Takeuchi, Tsutomu
Article History
Received: 18 December 2017
Revised: 8 February 2018
Accepted: 12 February 2018
First Online: 17 February 2018
Compliance with ethical standards
: This investigation was approved by the ethics committee (Ethics Committee of Keio University School of Medicine, approval number: 20110136). Informed consent from the patients was waived according to the regulations in Japan.
: None.