Article History
Received: 31 July 2019
Accepted: 24 January 2020
First Online: 30 January 2020
Compliance with ethical standards
:
: The authors have not received any support from any organization, and thus have no conflicts of interest directly relevant to the content of this article.
: This study was approved by the institutional review board of Kanazawa Medical University, and ethical approval and written informed consent were waived.