Kubota, Seiko
Imai, Tomoaki http://orcid.org/0000-0002-1404-8721
Nakazawa, Mitsuhiro
Uzawa, Narikazu
Article History
Received: 9 May 2019
Accepted: 4 June 2019
First Online: 17 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the internal review boards (H30-E27) and was conducted in accordance with the Declaration of Helsinki.
: The requirement to obtain informed consent was waived by the internal review boards because of the retrospective design.