Sugai, Keiko
Michikawa, Takehiro
Takebayashi, Toru
Matsumoto, Morio
Nakamura, Masaya
Nishiwaki, Yuji
Article History
Received: 31 July 2018
Accepted: 15 November 2018
First Online: 18 December 2018
Compliance with ethical standards
: The study protocol was approved by the Ethics Committees of Keio University School of Medicine (Tokyo, Japan) (Approval No.16-20) and Faculty of Medicine, Toho University (Tokyo, Japan) (Approval No. 2700623046), and written informed consent was obtained from all participants.
: None.