Iwai, Kohji http://orcid.org/0000-0002-0254-6897
Hatanaka, Yasuhiko
kawaguchi, Tamiro
Araki, Shin-ichi
Article History
Received: 23 October 2018
Accepted: 8 December 2018
First Online: 3 January 2019
Compliance with ethical standards
:
: None of the authors have any conflicts of interest to declare in connection with this paper. The study protocol conformed to the ethical guidelines of the 1975 Declaration of Helsinki as reflected in a priori approval by the clinical research ethical committee of Hospital of Shiga University of Medical Science (approval number: 27-187), and informed consent was obtained from all patients enrolled.