Article History
Received: 29 May 2018
Revised: 16 January 2019
Accepted: 19 January 2019
First Online: 25 January 2019
Compliance with ethical standards
:
: All authors have no conflicts of interest to disclose.
: All procedures in studies involving human participants were performed in accordance with the ethical standards of Kumamoto University Hospital, and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.